Electric Field and Potential Questions and Answers
![A hollow spherical conducting shell of inner radi r and outer radius r has a charge Q A charge qis placed at the centre of the sphere The surface charge densities on the inner and outer surfaces of the sphere will be respectively q q 1 4 and 471 2 2 101 q Q 9 2 4 q 4 r 2 and Q q 4 r 2 Q 9](https://media.kunduz.com/media/sug-question-candidate/20210526133936137207-2585497.jpg?w=256)
Physics
Electric Field and PotentialA hollow spherical conducting shell of inner radi r and outer radius r has a charge Q A charge qis placed at the centre of the sphere The surface charge densities on the inner and outer surfaces of the sphere will be respectively q q 1 4 and 471 2 2 101 q Q 9 2 4 q 4 r 2 and Q q 4 r 2 Q 9
![P123 The distance between the plates of a plane capacitor is d and the area of each plate is A As shown in the figure both plates of the capacitor are earthed and a small body carrying charge Q is placed between them at a distance x from one plate A Q What charge will accumulate on each plate](https://media.kunduz.com/media/sug-question-candidate/20210526145323924411-3434999.jpg?w=256)
Physics
Electric Field and PotentialP123 The distance between the plates of a plane capacitor is d and the area of each plate is A As shown in the figure both plates of the capacitor are earthed and a small body carrying charge Q is placed between them at a distance x from one plate A Q What charge will accumulate on each plate
![figure below shows the path of a positively charged particle 1 through a rectangular region of uniform electric field as shown in the figure What are the direction movement of particles 2 3 and 4 20 10 por Top at sana sana ang nang od tour Down 3 04](https://media.kunduz.com/media/sug-question-candidate/20210621202354469127-2351593.jpg?w=256)
Physics
Electric Field and Potentialfigure below shows the path of a positively charged particle 1 through a rectangular region of uniform electric field as shown in the figure What are the direction movement of particles 2 3 and 4 20 10 por Top at sana sana ang nang od tour Down 3 04
![Two small spheres each of mass m and charge q are tied from the same rigid support with the help of silk threads of length L They make angle with the vertical as shown in the figure If length L is decreased then angle 0 with the vertical L L m](https://media.kunduz.com/media/sug-question-candidate/20210613051557134789-3443308.jpg?w=256)
Physics
Electric Field and PotentialTwo small spheres each of mass m and charge q are tied from the same rigid support with the help of silk threads of length L They make angle with the vertical as shown in the figure If length L is decreased then angle 0 with the vertical L L m
![Find whether the given electric fields are possible or impossible electric field E xyi 2yzj 3xzk and E y i 2xy z2 j 2yzk a Only E is a possible electrostatic field b Both E and E are possible electrostatic field c Only E is a possible electrostatic field d Both E and E are impossible electrostatic field](https://media.kunduz.com/media/sug-question-candidate/20210526060800651830-2937892.jpg?w=256)
Physics
Electric Field and PotentialFind whether the given electric fields are possible or impossible electric field E xyi 2yzj 3xzk and E y i 2xy z2 j 2yzk a Only E is a possible electrostatic field b Both E and E are possible electrostatic field c Only E is a possible electrostatic field d Both E and E are impossible electrostatic field
![X and Y are large parallel conducting plates close to each other Each face has an area A X is given a charge Q Y is without any charge Point A B and C are as shown in the figure Find the incorrect option A 1 the field at B is 2 the field at B is X Q 250A ZA B C 3 the fields at A B and C are of the same magnitude 4 the fields at A and C are of the same magnitude but in opposite directions](https://media.kunduz.com/media/sug-question-candidate/20210526064050140912-2662149.jpg?w=256)
Physics
Electric Field and PotentialX and Y are large parallel conducting plates close to each other Each face has an area A X is given a charge Q Y is without any charge Point A B and C are as shown in the figure Find the incorrect option A 1 the field at B is 2 the field at B is X Q 250A ZA B C 3 the fields at A B and C are of the same magnitude 4 the fields at A and C are of the same magnitude but in opposite directions
![charge 0 4 C due to another small sphere of charge 0 8 C in air is 0 2 N a What is the distance between the two spheres b What is the force on the second sphere due to the first](https://media.kunduz.com/media/sug-question-candidate/20210525213205439680-3270385.jpg?w=256)
Physics
Electric Field and Potentialcharge 0 4 C due to another small sphere of charge 0 8 C in air is 0 2 N a What is the distance between the two spheres b What is the force on the second sphere due to the first
![16 Electric Potential is zero at point q B A D E C 41 3 ir e d dt 4 400 s 16 far 37 1 A D only 2 B C D only 3 A B C D E 4 None of these 17 The current in solenoid of 240 turns having a length 12 cm 17 240 and a E MON 9 1 hac A 2 3 A B 4](https://media.kunduz.com/media/sug-question-candidate/20210621161433592484-2662149.jpg?w=256)
Physics
Electric Field and Potential16 Electric Potential is zero at point q B A D E C 41 3 ir e d dt 4 400 s 16 far 37 1 A D only 2 B C D only 3 A B C D E 4 None of these 17 The current in solenoid of 240 turns having a length 12 cm 17 240 and a E MON 9 1 hac A 2 3 A B 4
![As a result of change in the magnetic flux linked to the closed loop shown in figure an emf V volt is induced in the loop The work done in joule in taking a charge q coulomb once along the loop is a qV c 2qV b zero qV d 2](https://media.kunduz.com/media/sug-question-candidate/20210613004655834523-2662149.jpg?w=256)
Physics
Electric Field and PotentialAs a result of change in the magnetic flux linked to the closed loop shown in figure an emf V volt is induced in the loop The work done in joule in taking a charge q coulomb once along the loop is a qV c 2qV b zero qV d 2
![question contains statements given in two columns which have to be matched Statements A B C column I have to be matched with statements p q r s t in column II A spherical cavity of radius r is made in a conducting sphere of radius 2r A charge q is kept at the cetnre of cavity as shown in the figure Match the following Column Total field at 4r 0 0 Field at 4r 0 0 due to a Total field at 1 2 0 0 Field at 1 2 0 0 due to g p Kq 16r q 4Kg r r Kq 25 5 4Kq 9r 0 0 2 Column it](https://media.kunduz.com/media/sug-question-candidate/20210621143810642857-3523151.jpg?w=256)
Physics
Electric Field and Potentialquestion contains statements given in two columns which have to be matched Statements A B C column I have to be matched with statements p q r s t in column II A spherical cavity of radius r is made in a conducting sphere of radius 2r A charge q is kept at the cetnre of cavity as shown in the figure Match the following Column Total field at 4r 0 0 Field at 4r 0 0 due to a Total field at 1 2 0 0 Field at 1 2 0 0 due to g p Kq 16r q 4Kg r r Kq 25 5 4Kq 9r 0 0 2 Column it
![25 Four point charges 9A 9B 2 C q 5 C qc 2 C and qD 5 C are located at the corners of a square ABCD of side 10 cm What is the force on a charge of 1 C placed at the centre of the square](https://media.kunduz.com/media/sug-question-candidate/20210525213254926682-3270385.jpg?w=256)
Physics
Electric Field and Potential25 Four point charges 9A 9B 2 C q 5 C qc 2 C and qD 5 C are located at the corners of a square ABCD of side 10 cm What is the force on a charge of 1 C placed at the centre of the square
![Figure shows some equipotential lines distributed in space A charged object is moved from point A to point B 20V 40V 30V 40V 30V HURL 48 1 46 1 B A B A B 10V 30V 50V 10V 20V 50V 10V 20V 40V 50V Figure I Figure II Figure III A The work done in figure i is the greatest M PAPER B The work done in figure ii is least C The work done is the same in figures i ii iii D The work done in figure iii is greater than figure ii but equal to that in figure i](https://media.kunduz.com/media/sug-question-candidate/20210525183916652775-3419385.jpg?w=256)
Physics
Electric Field and PotentialFigure shows some equipotential lines distributed in space A charged object is moved from point A to point B 20V 40V 30V 40V 30V HURL 48 1 46 1 B A B A B 10V 30V 50V 10V 20V 50V 10V 20V 40V 50V Figure I Figure II Figure III A The work done in figure i is the greatest M PAPER B The work done in figure ii is least C The work done is the same in figures i ii iii D The work done in figure iii is greater than figure ii but equal to that in figure i
![25 In a certain region of space electric field is along the z direction throughout The magnitude of electric field is however not constant but increases uniformly along the positive z direction at the rate of 105 NC 1 per metre What are the force and torque experienced by a system having a total dipole moment equal to 10 7 cm in the negative z direction](https://media.kunduz.com/media/sug-question-candidate/20210621141548236168-2278723.jpg?w=256)
Physics
Electric Field and Potential25 In a certain region of space electric field is along the z direction throughout The magnitude of electric field is however not constant but increases uniformly along the positive z direction at the rate of 105 NC 1 per metre What are the force and torque experienced by a system having a total dipole moment equal to 10 7 cm in the negative z direction
![26 A hollow charged conductor has a tiny hole cut into its surface Show that the electric field in the hole is o 2con where n is the unit vector in the outward normal direction and o is the surface charge density near the hole](https://media.kunduz.com/media/sug-question-candidate/20210621141621344765-2278723.jpg?w=256)
Physics
Electric Field and Potential26 A hollow charged conductor has a tiny hole cut into its surface Show that the electric field in the hole is o 2con where n is the unit vector in the outward normal direction and o is the surface charge density near the hole
![Four point charges are placed at the corners of a square of side a as shown in the figure A charge q is slowly displaced from P to P2 then work done in displacing the charge Q P a Q Positive O Negative Zero P English Insufficient information](https://media.kunduz.com/media/sug-question-candidate/20210612181956137255-3499694.jpg?w=256)
Physics
Electric Field and PotentialFour point charges are placed at the corners of a square of side a as shown in the figure A charge q is slowly displaced from P to P2 then work done in displacing the charge Q P a Q Positive O Negative Zero P English Insufficient information
![27 Obtain the formula for the electric field due to a long thin wire of uniform linear charge density E without using Gauss s law Hint Use Coulomb s law directly and evaluate the necessary integral](https://media.kunduz.com/media/sug-question-candidate/20210621141654386477-2278723.jpg?w=256)
Physics
Electric Field and Potential27 Obtain the formula for the electric field due to a long thin wire of uniform linear charge density E without using Gauss s law Hint Use Coulomb s law directly and evaluate the necessary integral
![97 At a distance from a uniformly charged long wire a charged particle is thrown radially outward with a velocity u in the direction perpendicular to the wire When the particle reaches a distance 2 from the wire its speed is found to be 2 u The magnitude of the velocity when it is a distance 4 away from the wire is ignore gravity a 3 u c 2 2 u b 2u d 4u](https://media.kunduz.com/media/sug-question-candidate/20210612165630594547-2165751.jpg?w=256)
Physics
Electric Field and Potential97 At a distance from a uniformly charged long wire a charged particle is thrown radially outward with a velocity u in the direction perpendicular to the wire When the particle reaches a distance 2 from the wire its speed is found to be 2 u The magnitude of the velocity when it is a distance 4 away from the wire is ignore gravity a 3 u c 2 2 u b 2u d 4u
![electric field pointing from the corner A towards the corner C What the charges induced on each rod 5 Three identical point charges are placed on the vertices of an equilate triangle At how many places within the triangle electric field vanish](https://media.kunduz.com/media/sug-question-candidate/20210612161929328928-3425230.jpg?w=256)
Physics
Electric Field and Potentialelectric field pointing from the corner A towards the corner C What the charges induced on each rod 5 Three identical point charges are placed on the vertices of an equilate triangle At how many places within the triangle electric field vanish
![1 Which electric field is responsible for the proton s trajectory as shown below 1 2 4 F F Parabolic trajectory f is in dirt of field EADER TEST SERIES JOINT PACKAGE RANK BOOSTER COURSE](https://media.kunduz.com/media/sug-question-candidate/20210621122922126286-3522955.jpg?w=256)
Physics
Electric Field and Potential1 Which electric field is responsible for the proton s trajectory as shown below 1 2 4 F F Parabolic trajectory f is in dirt of field EADER TEST SERIES JOINT PACKAGE RANK BOOSTER COURSE
![91 4 1 93 1 A frictionless non conducting inextensible thread of length wears three beads of positive charges 91 92 and 93 The ends of the thread are connected to make a knotless loop Length of the thread is so large as compared to the size of the beads that the beads can be treated as point particles The system is in a state of equilibrium with beads at vertices of a triangle a Find lengths 1 12 and 13 of the sides of the triangle b What relation the charges 91 92 and q3 must bear to establish the above mentioned state of equilibrium](https://media.kunduz.com/media/sug-question-candidate/20210612151139745238-3425230.jpg?w=256)
Physics
Electric Field and Potential91 4 1 93 1 A frictionless non conducting inextensible thread of length wears three beads of positive charges 91 92 and 93 The ends of the thread are connected to make a knotless loop Length of the thread is so large as compared to the size of the beads that the beads can be treated as point particles The system is in a state of equilibrium with beads at vertices of a triangle a Find lengths 1 12 and 13 of the sides of the triangle b What relation the charges 91 92 and q3 must bear to establish the above mentioned state of equilibrium
![AB is 1 meter long uniform wire of 10 ohm resistance The other data are as shown in the circuit diagram Calculate a potential gradient along AB and length AO of the wire when the galvanometer shows b no deflection A E 2V 1 20 0 30 150 E 1 5V](https://media.kunduz.com/media/sug-question-candidate/20210525103949745695-2109799.jpg?w=256)
Physics
Electric Field and PotentialAB is 1 meter long uniform wire of 10 ohm resistance The other data are as shown in the circuit diagram Calculate a potential gradient along AB and length AO of the wire when the galvanometer shows b no deflection A E 2V 1 20 0 30 150 E 1 5V
![Two substances are identical except that the electron mean free time for substance A is twice the electron mean free time for substance B If the same electric field exists in both substances the electron drift speed in A is A the same as in B 3 twice that in B C half that in B O four times that in B E one fourth that in B](https://media.kunduz.com/media/sug-question-candidate/20210621111321700044-3491993.jpg?w=256)
Physics
Electric Field and PotentialTwo substances are identical except that the electron mean free time for substance A is twice the electron mean free time for substance B If the same electric field exists in both substances the electron drift speed in A is A the same as in B 3 twice that in B C half that in B O four times that in B E one fourth that in B
![Q22 Two resistors have different temperature coefficient of resistance a 1 and a 2 What will be the equivalent temperature coefficient of their pa combination A a 1 a2 B a1 2 2 C a 1 a 1 D a 1 a 2](https://media.kunduz.com/media/sug-question-candidate/20210525062500620699-3173559.jpg?w=256)
Physics
Electric Field and PotentialQ22 Two resistors have different temperature coefficient of resistance a 1 and a 2 What will be the equivalent temperature coefficient of their pa combination A a 1 a2 B a1 2 2 C a 1 a 1 D a 1 a 2
![elect the correct statement If electric field is zero at a certain point then potential should be zero at that point If electric field is not zero at a certain point then potential should not be zero at that point If potential is zero at a certain point then electric field should be zero at that point If potential is zero at a certain point then electric field at that point may or may not be zero](https://media.kunduz.com/media/sug-question-candidate/20210612125034974334-1898926.jpg?w=256)
Physics
Electric Field and Potentialelect the correct statement If electric field is zero at a certain point then potential should be zero at that point If electric field is not zero at a certain point then potential should not be zero at that point If potential is zero at a certain point then electric field should be zero at that point If potential is zero at a certain point then electric field at that point may or may not be zero
![9 Keeping the voltage of the charging source constant what would be the percentage change in the energy stored in a parallel plate capacitor if the separation between its plates is decreased by 10 CBSE 09 11 1 increase](https://media.kunduz.com/media/sug-question-candidate/20210525032919011754-1664747.jpg?w=256)
Physics
Electric Field and Potential9 Keeping the voltage of the charging source constant what would be the percentage change in the energy stored in a parallel plate capacitor if the separation between its plates is decreased by 10 CBSE 09 11 1 increase
![Two spheres of radii 1 cm and 2 cm have been charged with 1 5 x 10 8 and 0 3 x 10 7 coulombs of posiitve charge When they are connected with a wire charge 1 will flow from the first to the second 2 will flow from the second to the first 3 will not flow at all 4 may flow either from first to second or from the second to first depending upon the length of the connecting wire](https://media.kunduz.com/media/sug-question-candidate/20210621100001648018-2351593.jpg?w=256)
Physics
Electric Field and PotentialTwo spheres of radii 1 cm and 2 cm have been charged with 1 5 x 10 8 and 0 3 x 10 7 coulombs of posiitve charge When they are connected with a wire charge 1 will flow from the first to the second 2 will flow from the second to the first 3 will not flow at all 4 may flow either from first to second or from the second to first depending upon the length of the connecting wire
![In the rectangle shown below the two corners have charges q 5 0 C and q 2 0 C 91 SHE 9 A B 15 cm 5 cm 922 2ML](https://media.kunduz.com/media/sug-question-candidate/20210621100811175299-3392849.jpg?w=256)
Physics
Electric Field and PotentialIn the rectangle shown below the two corners have charges q 5 0 C and q 2 0 C 91 SHE 9 A B 15 cm 5 cm 922 2ML
![2 Two spheres of radii R and R having equal charges are joined together with a copper wire If V is the potential of each sphere after they are separated from each other then the initial charge on both spheres was 1 R R V 3 R R 3k 2 Z R R 2k V R R 4 K R R k](https://media.kunduz.com/media/sug-question-candidate/20210621095220696201-2351593.jpg?w=256)
Physics
Electric Field and Potential2 Two spheres of radii R and R having equal charges are joined together with a copper wire If V is the potential of each sphere after they are separated from each other then the initial charge on both spheres was 1 R R V 3 R R 3k 2 Z R R 2k V R R 4 K R R k
![13 In a uniform electric field the potential of origin is V and at each of the points a 0 0 0 b 0 2 0 0 c The potential at a b c will be 1 3 V 2 V 2 3V 2 4 V I](https://media.kunduz.com/media/sug-question-candidate/20210621081626167961-3509254.jpg?w=256)
Physics
Electric Field and Potential13 In a uniform electric field the potential of origin is V and at each of the points a 0 0 0 b 0 2 0 0 c The potential at a b c will be 1 3 V 2 V 2 3V 2 4 V I
![Two fixed solid spheres of charges Q and KQ are separated by a distance 6R A charge q is to be projectes along the line joining their centres so that it can reach the surface of other solid sphere of charge KQ Bondh RA q m min i If k 4 find minimum velocity to be given 6R 2R kQ](https://media.kunduz.com/media/sug-question-candidate/20210612114146070500-2164505.jpg?w=256)
Physics
Electric Field and PotentialTwo fixed solid spheres of charges Q and KQ are separated by a distance 6R A charge q is to be projectes along the line joining their centres so that it can reach the surface of other solid sphere of charge KQ Bondh RA q m min i If k 4 find minimum velocity to be given 6R 2R kQ
![A conducting sphere of radius R carries a charge 30 as shown in Figure It is surrounded by linear dielectric material of relative permittivity e out of radius a a Find the electric field at all points b Find the electric potential at the center of the sphere taking the potential at infinity as zero 3Q R](https://media.kunduz.com/media/sug-question-candidate/20210612111037330820-2639165.jpg?w=256)
Physics
Electric Field and PotentialA conducting sphere of radius R carries a charge 30 as shown in Figure It is surrounded by linear dielectric material of relative permittivity e out of radius a a Find the electric field at all points b Find the electric potential at the center of the sphere taking the potential at infinity as zero 3Q R
![Two particles A and B having equal charges are placed at distance d apart A third charged particle placed on the perpendicular bisector of AB at distance x The third particle experiences the maximum force when O X X O X X d 2 2 d 2 2 d 3 2](https://media.kunduz.com/media/sug-question-candidate/20210621085542889668-3317355.jpg?w=256)
Physics
Electric Field and PotentialTwo particles A and B having equal charges are placed at distance d apart A third charged particle placed on the perpendicular bisector of AB at distance x The third particle experiences the maximum force when O X X O X X d 2 2 d 2 2 d 3 2
![Paragraph 2 A very long thick plate has a uniform positive volume charge density given by p x po for 2 is a positive constant d is the thickness of the plate and x 0 is the centre of the plate 34 d a 2 1 pAa 3 p Aa 2 Use Gauss law to find E a d 2 1 Pale 3 Pa 2 d 2 0 x axis 32 What is the symmetry of the electric field for this object 1 Planar 3 Cylindrical 2 Spherical 4 None of these 33 How much charge is contained in a Gaussian pillbox of cross sectional area A and thickness 2a where 2 2p Aa 4 4p Aa d 2 2p al 4 4p ale x 2 where d 35 How much charge is contained in a Gaussian pillbox of surface area A and thickness 2a where a 2 1 p Ad 2 2p Ad](https://media.kunduz.com/media/sug-question-candidate/20210612101008919457-2164505.jpg?w=256)
Physics
Electric Field and PotentialParagraph 2 A very long thick plate has a uniform positive volume charge density given by p x po for 2 is a positive constant d is the thickness of the plate and x 0 is the centre of the plate 34 d a 2 1 pAa 3 p Aa 2 Use Gauss law to find E a d 2 1 Pale 3 Pa 2 d 2 0 x axis 32 What is the symmetry of the electric field for this object 1 Planar 3 Cylindrical 2 Spherical 4 None of these 33 How much charge is contained in a Gaussian pillbox of cross sectional area A and thickness 2a where 2 2p Aa 4 4p Aa d 2 2p al 4 4p ale x 2 where d 35 How much charge is contained in a Gaussian pillbox of surface area A and thickness 2a where a 2 1 p Ad 2 2p Ad
![A wire AMB is placed along y axis having linear charge density C m The electric field intensity at point P is PM 0 1 m B 33 1 08 x 10 1 A V m 1 08 x 1010 A V m 1 54 x 10 1 A V m 1019 V m](https://media.kunduz.com/media/sug-question-candidate/20210524144826333694-2064826.jpg?w=256)
Physics
Electric Field and PotentialA wire AMB is placed along y axis having linear charge density C m The electric field intensity at point P is PM 0 1 m B 33 1 08 x 10 1 A V m 1 08 x 1010 A V m 1 54 x 10 1 A V m 1019 V m
![If the electric field just outside a thin conducting sheet is equal to 3 N C determine the surface charge density on the conductor Select one a 8 85 pC m2 b 35 4 pC m2 c 17 7 pC m2 d 53 pC m2 e 26 5pC m2](https://media.kunduz.com/media/sug-question-candidate/20210420062536989768-3130890.jpg?w=256)
Physics
Electric Field and PotentialIf the electric field just outside a thin conducting sheet is equal to 3 N C determine the surface charge density on the conductor Select one a 8 85 pC m2 b 35 4 pC m2 c 17 7 pC m2 d 53 pC m2 e 26 5pC m2
![Paragraph for Questions 6 and 7 The electric potential varies in space according to the relation V 3x 4y 5 volts where x and y are in meters A particle of mass 10 g starts from point 2m 3 2 m 0 under the influence of this field The charge on the particle is 10 C Neglect gravity The component of electric field in X direction is A 3Vm B 4 Vm C 5 Vm The magnitude of acceleration of particle is A 1 x 10 m s B 3 x 10 m s C 5 x 10 m s D 7 Vm D 7 x 10 m s](https://media.kunduz.com/media/sug-question-candidate/20210420050011296546-1865989.jpg?w=256)
Physics
Electric Field and PotentialParagraph for Questions 6 and 7 The electric potential varies in space according to the relation V 3x 4y 5 volts where x and y are in meters A particle of mass 10 g starts from point 2m 3 2 m 0 under the influence of this field The charge on the particle is 10 C Neglect gravity The component of electric field in X direction is A 3Vm B 4 Vm C 5 Vm The magnitude of acceleration of particle is A 1 x 10 m s B 3 x 10 m s C 5 x 10 m s D 7 Vm D 7 x 10 m s
![Under the influence of the Coulomb field of charge Q a charge q is moving around it in an elliptical orbit Find out the correct statement s 1 The angular momentum of the charge q is constant 2 The linear momentum of the charge q is constant 3 The angular velocity of the charge q is constant 4 The linear speed of the charge q is constant](https://media.kunduz.com/media/sug-question-candidate/20210612100617239589-2164505.jpg?w=256)
Physics
Electric Field and PotentialUnder the influence of the Coulomb field of charge Q a charge q is moving around it in an elliptical orbit Find out the correct statement s 1 The angular momentum of the charge q is constant 2 The linear momentum of the charge q is constant 3 The angular velocity of the charge q is constant 4 The linear speed of the charge q is constant
![Electric dipole is placed at origin as shown Point A B C D are at distance r from origin then match the List I with List II List I P Electric potential at A Q Electric potential at B R Electric potential at C S Electric potential at D Code P A 3 B 4 C 1 2 1 2 3 List II KP sin 0 r kP cos 0 KP sin 0 r KP cos 0 r X ASSROOM](https://media.kunduz.com/media/sug-question-candidate/20210420050218596682-1865989.jpg?w=256)
Physics
Electric Field and PotentialElectric dipole is placed at origin as shown Point A B C D are at distance r from origin then match the List I with List II List I P Electric potential at A Q Electric potential at B R Electric potential at C S Electric potential at D Code P A 3 B 4 C 1 2 1 2 3 List II KP sin 0 r kP cos 0 KP sin 0 r KP cos 0 r X ASSROOM
![Two identical small bodies each of mass m and charge q are suspended from two strings each of length from a fixed point This whole system is taken into an orbiting artificial satellite then find the tension in strings Kq 1 2mg 1 Kq 4 2 3 2mg Kq 1 2 Kq](https://media.kunduz.com/media/sug-question-candidate/20210612100521379843-2164505.jpg?w=256)
Physics
Electric Field and PotentialTwo identical small bodies each of mass m and charge q are suspended from two strings each of length from a fixed point This whole system is taken into an orbiting artificial satellite then find the tension in strings Kq 1 2mg 1 Kq 4 2 3 2mg Kq 1 2 Kq
![C 200 V m 100 V m D 200 V m 100 V m Figure shows a charge configuration with its equipotential surfaces and electric field lines placed in x y plane Mark INCORRECT statement DIGIT E B D A Potential gradient is positive along CD B Potential gradient is negative along EF C If a positive charge particle is constrained to move along line AB it will have constant potential energy D A positive charge particle released from rest at C will begin to move in direction DC](https://media.kunduz.com/media/sug-question-candidate/20210420045901002531-1865989.jpg?w=256)
Physics
Electric Field and PotentialC 200 V m 100 V m D 200 V m 100 V m Figure shows a charge configuration with its equipotential surfaces and electric field lines placed in x y plane Mark INCORRECT statement DIGIT E B D A Potential gradient is positive along CD B Potential gradient is negative along EF C If a positive charge particle is constrained to move along line AB it will have constant potential energy D A positive charge particle released from rest at C will begin to move in direction DC
![The axis of a long hollow metallic cylinder inner radius 1 0 cm outer radius 2 0 cm coincides with a long wire The wire has a linear charge density of 4 0 pC m and the cylinder has a net charge per unit length of 5 0 pC m Determine the magnitude of the electric field 3 0 cm from the axis Select one a 10 N C O b 7 2 N C C 5 N C d 5 4 N C e 9 N C](https://media.kunduz.com/media/sug-question-candidate/20210420062529779228-1903276.jpg?w=256)
Physics
Electric Field and PotentialThe axis of a long hollow metallic cylinder inner radius 1 0 cm outer radius 2 0 cm coincides with a long wire The wire has a linear charge density of 4 0 pC m and the cylinder has a net charge per unit length of 5 0 pC m Determine the magnitude of the electric field 3 0 cm from the axis Select one a 10 N C O b 7 2 N C C 5 N C d 5 4 N C e 9 N C
![A charge of 2 C is uniformly distributed on a spherical shel of radius 5 m Electric potential at the centre of sphere is Zero 4 5 10 V 7 2 x 10 V 3 6 10 V](https://media.kunduz.com/media/sug-question-candidate/20210612092536332088-2279121.jpg?w=256)
Physics
Electric Field and PotentialA charge of 2 C is uniformly distributed on a spherical shel of radius 5 m Electric potential at the centre of sphere is Zero 4 5 10 V 7 2 x 10 V 3 6 10 V
![7 Find the dipole moment of given configuration if P QR where R is the radius of the circle 8 30 A 3P C 3 2P An electric dipole kept in an uniform electric field may experience GITAL C D 4P](https://media.kunduz.com/media/sug-question-candidate/20210420045942304240-1865989.jpg?w=256)
Physics
Electric Field and Potential7 Find the dipole moment of given configuration if P QR where R is the radius of the circle 8 30 A 3P C 3 2P An electric dipole kept in an uniform electric field may experience GITAL C D 4P
![In the figure below a neutral insulating disk of mass M and radius R is pivoted at the center A small charge q having negligible mass is fixed to one edge and a charge of q having negligible mass is fixed to the opposite edge so that the line between the two charges makes a small angle with an applied uniform electric field E as shown A The torque on the disk is 2qRE sine B The angular frequency with which the disk oscillates C The angular frequency with which the disk oscillates D The torque on the disk is RE sine 4Eq MR 2Eq MR 9 M](https://media.kunduz.com/media/sug-question-candidate/20210420050048421211-1865989.jpg?w=256)
Physics
Electric Field and PotentialIn the figure below a neutral insulating disk of mass M and radius R is pivoted at the center A small charge q having negligible mass is fixed to one edge and a charge of q having negligible mass is fixed to the opposite edge so that the line between the two charges makes a small angle with an applied uniform electric field E as shown A The torque on the disk is 2qRE sine B The angular frequency with which the disk oscillates C The angular frequency with which the disk oscillates D The torque on the disk is RE sine 4Eq MR 2Eq MR 9 M
![Two point charges 4 C and 4 C are placed at a distance 1 5 m Total number of points except infinity where potentia due to system of charges is zero One Three Two](https://media.kunduz.com/media/sug-question-candidate/20210612081906598880-2279121.jpg?w=256)
Physics
Electric Field and PotentialTwo point charges 4 C and 4 C are placed at a distance 1 5 m Total number of points except infinity where potentia due to system of charges is zero One Three Two
![The electric field intensity at a point at distance 4 m from a charge is 4 V m The amount of work in bringing a charge of 4 coulomb from infinity to same point is 8 J 16 J 64 J 32 J](https://media.kunduz.com/media/sug-question-candidate/20210612092521523978-2279121.jpg?w=256)
Physics
Electric Field and PotentialThe electric field intensity at a point at distance 4 m from a charge is 4 V m The amount of work in bringing a charge of 4 coulomb from infinity to same point is 8 J 16 J 64 J 32 J
![n the figure shown a point charge 2Q is placed at the centre The two concentric thin conducting spherical shells of radi R and 2R shown have charges Q and 2Q respectively Find the amount of heat generated in J after the shell of adius R is earthed Take R 1 cm Q 1 C 0 20 2R](https://media.kunduz.com/media/sug-question-candidate/20210524061755652770-3446625.jpg?w=256)
Physics
Electric Field and Potentialn the figure shown a point charge 2Q is placed at the centre The two concentric thin conducting spherical shells of radi R and 2R shown have charges Q and 2Q respectively Find the amount of heat generated in J after the shell of adius R is earthed Take R 1 cm Q 1 C 0 20 2R
![A thin quarter ring of radius 2R has a positive charge distributed uniformly over it The net field E at centre O is 4 O O O 20 i FER 16 CR Q STER 4x soR 20 TER 16n R Q STER](https://media.kunduz.com/media/sug-question-candidate/20210524073145258834-3446707.jpg?w=256)
Physics
Electric Field and PotentialA thin quarter ring of radius 2R has a positive charge distributed uniformly over it The net field E at centre O is 4 O O O 20 i FER 16 CR Q STER 4x soR 20 TER 16n R Q STER
![Charges q Q and q are placed at equal distance on a straight line If the total potential energy of the system of three charges is zero then find the ratio Q q q Q O 1 2 O 1 4 O 2 3 3 4 2r 9](https://media.kunduz.com/media/sug-question-candidate/20210612085953904560-1898926.jpg?w=256)
Physics
Electric Field and PotentialCharges q Q and q are placed at equal distance on a straight line If the total potential energy of the system of three charges is zero then find the ratio Q q q Q O 1 2 O 1 4 O 2 3 3 4 2r 9
![ng spheres A and B are kept very near to each other A is positively charged and B is earthed then true statement is 4 A O B 1 A C Y A Charge on B zero B Potential at B is zero C Charge is uniformly distributed on A D Charge is non uniformly distributed or sphere A funda 19 2 A D](https://media.kunduz.com/media/sug-question-candidate/20210621062707912289-3491464.jpg?w=256)
Physics
Electric Field and Potentialng spheres A and B are kept very near to each other A is positively charged and B is earthed then true statement is 4 A O B 1 A C Y A Charge on B zero B Potential at B is zero C Charge is uniformly distributed on A D Charge is non uniformly distributed or sphere A funda 19 2 A D