Magnetic Field Questions and Answers
![A circular coil of radius R and a current I which can rotate about a fixed axis passing through its diameter is initially placed such that its plane lies along magnetic field B Kinetic energy of loop when it rotates through an angle 90 is Assume that I remains constant A R2BI B TRBI 2 C 2 R BI D TR TR I](https://media.kunduz.com/media/sug-question-candidate/20201001151323042117-727448.jpg?w=256)
Physics
Magnetic FieldA circular coil of radius R and a current I which can rotate about a fixed axis passing through its diameter is initially placed such that its plane lies along magnetic field B Kinetic energy of loop when it rotates through an angle 90 is Assume that I remains constant A R2BI B TRBI 2 C 2 R BI D TR TR I
![12 Figure 35 W10 shows a cross section of a large metal sheet carrying an electric current along its surface The current in a strip of width dl is Kdl where K is al constant Find the magnetic field at a point P at a distance x from the metal sheet P O O O O O O O O O O 25 W10 TxL 1 STUDE](https://media.kunduz.com/media/sug-question-candidate/20201009063717396402-1906780.jpg?w=256)
Physics
Magnetic Field12 Figure 35 W10 shows a cross section of a large metal sheet carrying an electric current along its surface The current in a strip of width dl is Kdl where K is al constant Find the magnetic field at a point P at a distance x from the metal sheet P O O O O O O O O O O 25 W10 TxL 1 STUDE
![remove slowest emitted photoelectrons iii What is the stopping potential iv What is the cut off Ans i 1 9875 eV ii zero iii 1 9875 V iv 2946 wavelength for aluminium 7 The most energetic photoelectrons emitted from a surface by 3500 photons bend in a 0 18 m circle by a magnetic field of 1 5 x 105 T Find the work function of the surface Ans 2 9 eV](https://media.kunduz.com/media/sug-question-candidate/20200731095516875315-1757214.jpg?w=256)
Physics
Magnetic Fieldremove slowest emitted photoelectrons iii What is the stopping potential iv What is the cut off Ans i 1 9875 eV ii zero iii 1 9875 V iv 2946 wavelength for aluminium 7 The most energetic photoelectrons emitted from a surface by 3500 photons bend in a 0 18 m circle by a magnetic field of 1 5 x 105 T Find the work function of the surface Ans 2 9 eV
![TC A compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole It CBSE AIPMT 2012 a will become rigid showing no movement b will stay in any position c will stay in North South direction only d will stay in East West direction only](https://media.kunduz.com/media/sug-question-candidate/20200910201006382592-1951111.jpg?w=256)
Physics
Magnetic FieldTC A compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole It CBSE AIPMT 2012 a will become rigid showing no movement b will stay in any position c will stay in North South direction only d will stay in East West direction only
![80 A circular wire ABC and a straight conductor ADC are carrying current i and are kept in the magnetic field B then considering points A and C 1 Force as per ABC is more than ADC 2 Force as per ABC is less than ADC 3 Force as per ABC is equal to that as per ADC 4 Any of 1 or 2 or 3 12 bu B D A F Idla B sin](https://media.kunduz.com/media/sug-question-candidate/20200924124437335655-2118705.jpg?w=256)
Physics
Magnetic Field80 A circular wire ABC and a straight conductor ADC are carrying current i and are kept in the magnetic field B then considering points A and C 1 Force as per ABC is more than ADC 2 Force as per ABC is less than ADC 3 Force as per ABC is equal to that as per ADC 4 Any of 1 or 2 or 3 12 bu B D A F Idla B sin
![2 The number of turns per unit length of a long solenoid is 10 If its average radius is 5 cm and it carries a current of 10 A then the ratio of flux densities obtained at the centre and at the end on the axis will be 1 1 2 2 2 1 3 1 1](https://media.kunduz.com/media/sug-question-candidate/20200916034238112596-2012324.jpg?w=256)
Physics
Magnetic Field2 The number of turns per unit length of a long solenoid is 10 If its average radius is 5 cm and it carries a current of 10 A then the ratio of flux densities obtained at the centre and at the end on the axis will be 1 1 2 2 2 1 3 1 1
![2 2 In the following graph the change of magnetic flux between t 0 to f 3 s is 1 10 weber 50 weber 21 Induced emf 10 V 2 t s 3 2 5 weber 4 20 weber](https://media.kunduz.com/media/sug-question-candidate/20200926080402122969-1905519.jpg?w=256)
Physics
Magnetic Field2 2 In the following graph the change of magnetic flux between t 0 to f 3 s is 1 10 weber 50 weber 21 Induced emf 10 V 2 t s 3 2 5 weber 4 20 weber
![38 Magnetic fleld changing at the rate of 4T sec in a circular region of 5 cm radius The value of induced electric field at a point P which is 10 cm distance away from the centre O of region is 5 cm 1 0 05 V m 3 0 5 V m dt 10 cm 2 0 2 V m 4 2V m](https://media.kunduz.com/media/sug-question-candidate/20201017173902875722-1987734.jpg?w=256)
Physics
Magnetic Field38 Magnetic fleld changing at the rate of 4T sec in a circular region of 5 cm radius The value of induced electric field at a point P which is 10 cm distance away from the centre O of region is 5 cm 1 0 05 V m 3 0 5 V m dt 10 cm 2 0 2 V m 4 2V m
![A magnetic field B Boy a k is into the plane of paper in the z direction B and a are positive constants A square loop EFGH of side a mass m and resistance R in x y plane starts falling under the influence of gravity Note the directions of x and y axes in the figure Find a the induced current in the loop and indicate its direction b the total Lorentz force acting on the loop and indicate its direction c an expression for the speed of the loop v t and its terminal value Jed y E x G H de06 B0AH A KotaVEE A](https://media.kunduz.com/media/sug-question-candidate/20200914120129586072-1448524.jpg?w=256)
Physics
Magnetic FieldA magnetic field B Boy a k is into the plane of paper in the z direction B and a are positive constants A square loop EFGH of side a mass m and resistance R in x y plane starts falling under the influence of gravity Note the directions of x and y axes in the figure Find a the induced current in the loop and indicate its direction b the total Lorentz force acting on the loop and indicate its direction c an expression for the speed of the loop v t and its terminal value Jed y E x G H de06 B0AH A KotaVEE A
![The dipole moment of the given charge distribution is a c 4Rq TC 4Rq TU 2Rq TU 9 d 2Rq TT R 9](https://media.kunduz.com/media/sug-question-candidate/20200917112354763426-1884634.jpg?w=256)
Physics
Magnetic FieldThe dipole moment of the given charge distribution is a c 4Rq TC 4Rq TU 2Rq TU 9 d 2Rq TT R 9
![Magnetic field at P due to given structure is Ho 10 4T 2R Mo 5 0 3 4T 6R R 2 Mo 610 4t 5R Ho 2 0 4 R](https://media.kunduz.com/media/sug-question-candidate/20200925091438306270-2124326.jpg?w=256)
Physics
Magnetic FieldMagnetic field at P due to given structure is Ho 10 4T 2R Mo 5 0 3 4T 6R R 2 Mo 610 4t 5R Ho 2 0 4 R
![23 A charged particle moves in a magnetic field 8 101 with initial velocity 5i 4j The path of the particle will be A straight line C helical Sol B circle D none](https://media.kunduz.com/media/sug-question-candidate/20200923162558721053-1987734.jpg?w=256)
Physics
Magnetic Field23 A charged particle moves in a magnetic field 8 101 with initial velocity 5i 4j The path of the particle will be A straight line C helical Sol B circle D none
![11 Electric field intensity at a point in between two parallel sheets with like charges of same surface charge densities o is a 280 b o b 80 c zero d 20 E](https://media.kunduz.com/media/sug-question-candidate/20201007141434727917-2072756.jpg?w=256)
Physics
Magnetic Field11 Electric field intensity at a point in between two parallel sheets with like charges of same surface charge densities o is a 280 b o b 80 c zero d 20 E
![3 A particle of mass m and charge q moves with a constant velocity v along the positive x direction It enters a region containing a uniform magnetic field B directed along the negative z direction extending from x a to x b The minimum value of v required so that the particle can just enter the region x b is a qbB m c qaB m b q b a B m d q b a B 2m 37](https://media.kunduz.com/media/sug-question-candidate/20201014005004032090-2072756.jpg?w=256)
Physics
Magnetic Field3 A particle of mass m and charge q moves with a constant velocity v along the positive x direction It enters a region containing a uniform magnetic field B directed along the negative z direction extending from x a to x b The minimum value of v required so that the particle can just enter the region x b is a qbB m c qaB m b q b a B m d q b a B 2m 37
![33 There are two stationary fields of force F ayi and F axi byj where i and j are the unit vectors of the x and y axes and a and b ar constants Find out whether these fields are potential](https://media.kunduz.com/media/sug-question-candidate/20200914043113768458-1960479.jpg?w=256)
Physics
Magnetic Field33 There are two stationary fields of force F ayi and F axi byj where i and j are the unit vectors of the x and y axes and a and b ar constants Find out whether these fields are potential
![A long wire carries a current of 90A from east to we direction Magnetic field due to current at a poi which is 1 5 m vertically below the wire 1 12 x 10 6 T towards north 2 6x10 6T towards south 3 12 x 10 6 T towards south 4 6 x 10 6 T towards north](https://media.kunduz.com/media/sug-question-candidate/20201016042816522165-2256822.jpg?w=256)
Physics
Magnetic FieldA long wire carries a current of 90A from east to we direction Magnetic field due to current at a poi which is 1 5 m vertically below the wire 1 12 x 10 6 T towards north 2 6x10 6T towards south 3 12 x 10 6 T towards south 4 6 x 10 6 T towards north
![A long straight wire of radius a carries a steady current I The current is uniformly distributed across its cross section The ratio of the magnetic field at a 4 is 1 1 1 2 7 16 1 3 inside and outside from the surface of wire 4 NCERT Pg 149 a 15 16 Uo 0](https://media.kunduz.com/media/sug-question-candidate/20200914100730094474-2043552.jpg?w=256)
Physics
Magnetic FieldA long straight wire of radius a carries a steady current I The current is uniformly distributed across its cross section The ratio of the magnetic field at a 4 is 1 1 1 2 7 16 1 3 inside and outside from the surface of wire 4 NCERT Pg 149 a 15 16 Uo 0
![Twelve indentical capacitors each of capacitance C are connected as shown in figure 6C A The effective capacitance between P and T is 5 B The effective capacitance between P and U is 4C 3 12C C The effective capacitance between P and V is D All of the above statements are incorrect U Ans A B C](https://media.kunduz.com/media/sug-question-candidate/20200920072153957699-1513740.jpg?w=256)
Physics
Magnetic FieldTwelve indentical capacitors each of capacitance C are connected as shown in figure 6C A The effective capacitance between P and T is 5 B The effective capacitance between P and U is 4C 3 12C C The effective capacitance between P and V is D All of the above statements are incorrect U Ans A B C
![55 The magnetic field dB due to a small current element dl at a distance 7 and element carrying current i is a dB 02 di xr 4T i 4t b dB Ho i 4 c dB Ho r TT d dB 02 4t dl xr di x r di x 7 1996](https://media.kunduz.com/media/sug-question-candidate/20200925101629469857-2124796.jpg?w=256)
Physics
Magnetic Field55 The magnetic field dB due to a small current element dl at a distance 7 and element carrying current i is a dB 02 di xr 4T i 4t b dB Ho i 4 c dB Ho r TT d dB 02 4t dl xr di x r di x 7 1996
![30 Choose the correct statement 1 It is possible for a current loop to stay without rotating in a uniform magnetic field 2 If a uniform magnetic field exists in a cubical region and zero outside then it is not possible to project a charged particle from outside into the field so that it describes a complete circle in the field 3 A moving charged particle can be accelerate by a magnetic field 4 All of these](https://media.kunduz.com/media/sug-question-candidate/20200928112936074877-2116732.jpg?w=256)
Physics
Magnetic Field30 Choose the correct statement 1 It is possible for a current loop to stay without rotating in a uniform magnetic field 2 If a uniform magnetic field exists in a cubical region and zero outside then it is not possible to project a charged particle from outside into the field so that it describes a complete circle in the field 3 A moving charged particle can be accelerate by a magnetic field 4 All of these
![Q7 A wire loop with a 10 0 cm and b 15 0 cm and a long straight wire is arranged as shown in figure The current in the wire is changing according with a relation i 5 0t 10 0t where i is in amperes and t is in seconds K b b a Find the emf in the square loop at t 4 0 s b What is the direction of the induced current in the loop](https://media.kunduz.com/media/sug-question-candidate/20200910225243681594-2023507.jpg?w=256)
Physics
Magnetic FieldQ7 A wire loop with a 10 0 cm and b 15 0 cm and a long straight wire is arranged as shown in figure The current in the wire is changing according with a relation i 5 0t 10 0t where i is in amperes and t is in seconds K b b a Find the emf in the square loop at t 4 0 s b What is the direction of the induced current in the loop
![A hollow non conducting sphere of radius R has a positive charge q uniformly distributed on its surface The sphere starts rotating with a constant angular velocity o about an axis passing through center of sphere as shown in the figure Then the net magnetic field at center of the sphere is A B C How 2 R How 6 R D Ho9 3 R Hoq 12TR O 9 R](https://media.kunduz.com/media/sug-question-candidate/20200911144810279361-1448524.jpg?w=256)
Physics
Magnetic FieldA hollow non conducting sphere of radius R has a positive charge q uniformly distributed on its surface The sphere starts rotating with a constant angular velocity o about an axis passing through center of sphere as shown in the figure Then the net magnetic field at center of the sphere is A B C How 2 R How 6 R D Ho9 3 R Hoq 12TR O 9 R
![Find The area enclosed by a circular coil of 2000 turns is 10 cm Its plane is kept perpendicular to a magnetic field of 0 3 Wb m2 and is rotated through 180 Calculate the magnitude of change in magnetic flux](https://media.kunduz.com/media/sug-question-candidate/20200915043718765755-1895277.jpg?w=256)
Physics
Magnetic FieldFind The area enclosed by a circular coil of 2000 turns is 10 cm Its plane is kept perpendicular to a magnetic field of 0 3 Wb m2 and is rotated through 180 Calculate the magnitude of change in magnetic flux
![A flat coil with radius 8 mm has fifty loops of wire on it It is placed in a magnetic field of 0 3 T so that the maximum flux goes through it Later it is rotated in 0 02 s to a position such that no flux goes through it Find the average emf induced between the terminals of the coil Two concentric pirou](https://media.kunduz.com/media/sug-question-candidate/20200914113342880438-1448524.jpg?w=256)
Physics
Magnetic FieldA flat coil with radius 8 mm has fifty loops of wire on it It is placed in a magnetic field of 0 3 T so that the maximum flux goes through it Later it is rotated in 0 02 s to a position such that no flux goes through it Find the average emf induced between the terminals of the coil Two concentric pirou
![target Find the force imparted by the beam on the target if the beam current is equal to I 1 An infinite uniform current carrying wire is kept along z axis carrrying current I in the direction of the positive z axis OABCDEFG represents a circle where all the points are equally spaced whose centre at point 4m 0 m and radius 4 m as shown in the figure If B d DEF unit then find the value of k YA E 00 4m 0 m D A Holo in S I A shus grinde OLD BIS A Stries Horlw tomoubnoo](https://media.kunduz.com/media/sug-question-candidate/20200914114408229631-1448524.jpg?w=256)
Physics
Magnetic Fieldtarget Find the force imparted by the beam on the target if the beam current is equal to I 1 An infinite uniform current carrying wire is kept along z axis carrrying current I in the direction of the positive z axis OABCDEFG represents a circle where all the points are equally spaced whose centre at point 4m 0 m and radius 4 m as shown in the figure If B d DEF unit then find the value of k YA E 00 4m 0 m D A Holo in S I A shus grinde OLD BIS A Stries Horlw tomoubnoo
![and q masses m and m and having rad R and R respectively are rotating wit angular velocity o then the gyro magnetic rati of the system will be x 40 R q R q R 1 2 m R m R 9 92 3 2 m R m R2 x XX R XX i xxx q R q R 2 2 m m 4 None](https://media.kunduz.com/media/sug-question-candidate/20200911112735680650-2025747.jpg?w=256)
Physics
Magnetic Fieldand q masses m and m and having rad R and R respectively are rotating wit angular velocity o then the gyro magnetic rati of the system will be x 40 R q R q R 1 2 m R m R 9 92 3 2 m R m R2 x XX R XX i xxx q R q R 2 2 m m 4 None
![A particle of specific charge q m is projected from the origin of coordinates with initial velocity ui vj Uniform electric and magnetic fields exist in the region along the y direction of magnitude E and B The particle will definitely return to the origin once if B u v 2 B TE is an integer D uB TE is an integer odi nwone A VB 2TE is an integer C VB TE in an integer peopubnoo gnol owT](https://media.kunduz.com/media/sug-question-candidate/20200914115555982806-1448524.jpg?w=256)
Physics
Magnetic FieldA particle of specific charge q m is projected from the origin of coordinates with initial velocity ui vj Uniform electric and magnetic fields exist in the region along the y direction of magnitude E and B The particle will definitely return to the origin once if B u v 2 B TE is an integer D uB TE is an integer odi nwone A VB 2TE is an integer C VB TE in an integer peopubnoo gnol owT
![A long cylindrical volume contains a uniformly distributed charge of density p Find the flux due to the electric field through the curved surface of the small cylinder whose axis is OP and whose radius is a Here O lies on the axis AB of the main cylinder containing the charge density p and its axis OP is perpendicular to AB and lies completely within the main cylinder A 60 X B](https://media.kunduz.com/media/sug-question-candidate/20200913095340039914-1448524.jpg?w=256)
Physics
Magnetic FieldA long cylindrical volume contains a uniformly distributed charge of density p Find the flux due to the electric field through the curved surface of the small cylinder whose axis is OP and whose radius is a Here O lies on the axis AB of the main cylinder containing the charge density p and its axis OP is perpendicular to AB and lies completely within the main cylinder A 60 X B
![2 At a point A on the earth s surface the angle of dip 8 25 At a point B on the earth s surface the angle of dip 8 25 We can interpret that 1 A and B are both located in the northern hemisphere 2 A is located in the southern hemisphere and B is located in the northern hemisphere 3 A is located in the northern hemisphere and B is located in the southern hemisphere 4 A and B are both located in the southern hemisphera 45](https://media.kunduz.com/media/sug-question-candidate/20200910094511139471-2007385.jpg?w=256)
Physics
Magnetic Field2 At a point A on the earth s surface the angle of dip 8 25 At a point B on the earth s surface the angle of dip 8 25 We can interpret that 1 A and B are both located in the northern hemisphere 2 A is located in the southern hemisphere and B is located in the northern hemisphere 3 A is located in the northern hemisphere and B is located in the southern hemisphere 4 A and B are both located in the southern hemisphera 45
![y A conducting wire is bent in the form of a parabola y 2x carrying a current i 2A as shown in the figure The wire is placed in a uniform magnetic field B 4K The magnetic force on the wire is A 161 C 32i B 32i D 16i 2m 0 X](https://media.kunduz.com/media/sug-question-candidate/20200912170832360859-1448524.jpg?w=256)
Physics
Magnetic Fieldy A conducting wire is bent in the form of a parabola y 2x carrying a current i 2A as shown in the figure The wire is placed in a uniform magnetic field B 4K The magnetic force on the wire is A 161 C 32i B 32i D 16i 2m 0 X
![Magnetic dipole moment of Het hydrogen like atoms in the ground state will be g is Bohr magneton 1 zero 3 HB 2 HB 2 3 4 B](https://media.kunduz.com/media/sug-question-candidate/20200911133229678955-2025747.jpg?w=256)
Physics
Magnetic FieldMagnetic dipole moment of Het hydrogen like atoms in the ground state will be g is Bohr magneton 1 zero 3 HB 2 HB 2 3 4 B
![A straight wire of diameter of 0 5 mm carrying a current of 1A is replaced by another wire of 1mm diameter carrying the same current The strength of magnetic field far away is unchanged B quarter of its earlier value twice the earlier value half of the earlier value D A C](https://media.kunduz.com/media/sug-question-candidate/20200911120218974394-665061.jpg?w=256)
Physics
Magnetic FieldA straight wire of diameter of 0 5 mm carrying a current of 1A is replaced by another wire of 1mm diameter carrying the same current The strength of magnetic field far away is unchanged B quarter of its earlier value twice the earlier value half of the earlier value D A C
![Ans 0 8 Nm A square coil of side 10 cm has 20 turns and carries a current of 12 A The coil is suspended vertically the normal to the plane of the coil makes an angle of 30 with the direction of a uniform horizontal magnetic field If the torque experienced by the coil equals 0 96 N m find the magnitude of the magnetic field C B S E 2010 S Ans 0 8 TI](https://media.kunduz.com/media/sug-question-candidate/20200904145315866171-1970987.jpg?w=256)
Physics
Magnetic FieldAns 0 8 Nm A square coil of side 10 cm has 20 turns and carries a current of 12 A The coil is suspended vertically the normal to the plane of the coil makes an angle of 30 with the direction of a uniform horizontal magnetic field If the torque experienced by the coil equals 0 96 N m find the magnitude of the magnetic field C B S E 2010 S Ans 0 8 TI
![particle of m and charge q enter with velocity v in region where magnetic field in only right of PQ line of magnitude B Find magnitude of change in velocity V 3 Opiul 2 2V 4 Fooso O 3 V 2 4 zero](https://media.kunduz.com/media/sug-question-candidate/20200911112536337512-2025747.jpg?w=256)
Physics
Magnetic Fieldparticle of m and charge q enter with velocity v in region where magnetic field in only right of PQ line of magnitude B Find magnitude of change in velocity V 3 Opiul 2 2V 4 Fooso O 3 V 2 4 zero
![The potential difference across a 10 H inductor as a function of time is shown in the figure At t 0 current is zero Then A The current in the inductor at t 6 sec is 3 amp B The current in the inductor at t 1 sec is 1 4 amp C The current in the inductor at t 4 sec is 5 2 amp D The variation of current versus time is parabola V Volts 10 V 0 10 2 6 sec](https://media.kunduz.com/media/sug-question-candidate/20200911144615047409-1448524.jpg?w=256)
Physics
Magnetic FieldThe potential difference across a 10 H inductor as a function of time is shown in the figure At t 0 current is zero Then A The current in the inductor at t 6 sec is 3 amp B The current in the inductor at t 1 sec is 1 4 amp C The current in the inductor at t 4 sec is 5 2 amp D The variation of current versus time is parabola V Volts 10 V 0 10 2 6 sec
![1 Magnetic flux is a scalar quantity 2 The unit for magnetic flux is Weber 3 Magnetic flux has direction 4 The magnitude of the magnetic flux value does not depend on the area The exact statement about magnetic flux](https://media.kunduz.com/media/sug-question-candidate/20200910041308440802-1896207.jpg?w=256)
Physics
Magnetic Field1 Magnetic flux is a scalar quantity 2 The unit for magnetic flux is Weber 3 Magnetic flux has direction 4 The magnitude of the magnetic flux value does not depend on the area The exact statement about magnetic flux
![A charge moving with constant velocity produces 1 Only electric field 2 Only magnetic field 3 Both electric and magnetic field and also radiates 4 Both electric and magnetic field and does not radiates](https://media.kunduz.com/media/sug-question-candidate/20200909053811791119-1863538.jpg?w=256)
Physics
Magnetic FieldA charge moving with constant velocity produces 1 Only electric field 2 Only magnetic field 3 Both electric and magnetic field and also radiates 4 Both electric and magnetic field and does not radiates
![A long straight wire carrying a current of 30 A is placed in an external uniform magnetic field of induction 4 x 104 T The magnetic field is acting parallel to the direction of current The magnitude of the resultant magnetic induction in tesla at a point 2 0 cm away from the wire is uo 4 x 10 7 H m hollis B 3 10 4 C 5 x 10 4 D 6 x 10 4 A 10 4 81](https://media.kunduz.com/media/sug-question-candidate/20200910135040172363-665061.jpg?w=256)
Physics
Magnetic FieldA long straight wire carrying a current of 30 A is placed in an external uniform magnetic field of induction 4 x 104 T The magnetic field is acting parallel to the direction of current The magnitude of the resultant magnetic induction in tesla at a point 2 0 cm away from the wire is uo 4 x 10 7 H m hollis B 3 10 4 C 5 x 10 4 D 6 x 10 4 A 10 4 81
![Two forces are applied to a 5 0 kg object and it accelerates at a rate of 2 0 m s2 in the positive y direction If one of the forces acts in the positive x direction with magnitude 12 0 N find the magnitude of the other force](https://media.kunduz.com/media/sug-question-candidate/20200813174603727093-1704471.jpg?w=256)
Physics
Magnetic FieldTwo forces are applied to a 5 0 kg object and it accelerates at a rate of 2 0 m s2 in the positive y direction If one of the forces acts in the positive x direction with magnitude 12 0 N find the magnitude of the other force
![A particle of charge q and mass m starts moving from origin under the action of an electric field E Ei and B Boi with velocity v v The time after which its speed becomes 2v is 1 2 3 4 2mvo qEo 2B 9 mvo 3 Boq mvo 3 mvo](https://media.kunduz.com/media/sug-question-candidate/20200812152700141821-1890826.jpg?w=256)
Physics
Magnetic FieldA particle of charge q and mass m starts moving from origin under the action of an electric field E Ei and B Boi with velocity v v The time after which its speed becomes 2v is 1 2 3 4 2mvo qEo 2B 9 mvo 3 Boq mvo 3 mvo
![11 Magnetic field at the centre O due to the give structure is 1 3 NE Mol 3 1 4R 2 T O Mol 3 1 R 2 O R M 3 1 2R Moll 4 AR 2 3 0](https://media.kunduz.com/media/sug-question-candidate/20200812154231763935-1878980.jpg?w=256)
Physics
Magnetic Field11 Magnetic field at the centre O due to the give structure is 1 3 NE Mol 3 1 4R 2 T O Mol 3 1 R 2 O R M 3 1 2R Moll 4 AR 2 3 0
![A circular flexible current loop of radius R carrying current is placed in an inward magnetic field B If we spin the loop clockwise with angular speed w then tension in string Assume the mass of the loop is m XX XXX 1 Is zero 2 Is more than IBR 3 Is less than iBR X XB X X X ad on rotation](https://media.kunduz.com/media/sug-question-candidate/20200812152450449052-1890826.jpg?w=256)
Physics
Magnetic FieldA circular flexible current loop of radius R carrying current is placed in an inward magnetic field B If we spin the loop clockwise with angular speed w then tension in string Assume the mass of the loop is m XX XXX 1 Is zero 2 Is more than IBR 3 Is less than iBR X XB X X X ad on rotation
![3 A steady current is set up in a network composed of wires of equal resistance and length d as shown in Figure What is the magnetic field at the centre P B C a H Ho 21 4x d E P D G F c 0 Pamprayed Grank b Ho 31 4x 2d d Ho Onl 4n d](https://media.kunduz.com/media/sug-question-candidate/20200904041706137110-1987734.jpg?w=256)
Physics
Magnetic Field3 A steady current is set up in a network composed of wires of equal resistance and length d as shown in Figure What is the magnetic field at the centre P B C a H Ho 21 4x d E P D G F c 0 Pamprayed Grank b Ho 31 4x 2d d Ho Onl 4n d
![1 A coil in the shape of square is placed in a variable magnetic field which varies at the rate o dB dt as shown in figure The magnitude of em between points a and d along path abcd will be 1 2 L B L dB 2 dt dB dt 3 2L dt 4 31 2 dB dt O d C dB dt](https://media.kunduz.com/media/sug-question-candidate/20200812152625060374-1890826.jpg?w=256)
Physics
Magnetic Field1 A coil in the shape of square is placed in a variable magnetic field which varies at the rate o dB dt as shown in figure The magnitude of em between points a and d along path abcd will be 1 2 L B L dB 2 dt dB dt 3 2L dt 4 31 2 dB dt O d C dB dt
![An a particle is travelling at right angles to magnetic field with a speed of 6 105 m s strength of the magnetic field is 0 2 T Calculate i Force on the a particle ii Acceleration of the o particle](https://media.kunduz.com/media/sug-question-candidate/20200812142056430492-1902390.jpg?w=256)
Physics
Magnetic FieldAn a particle is travelling at right angles to magnetic field with a speed of 6 105 m s strength of the magnetic field is 0 2 T Calculate i Force on the a particle ii Acceleration of the o particle
![Two vectors A and B are such that A B C and I IBHCI Then the vectors A and B are 1 parallel 3 anti parallel 2 perpendicular 4 null vectors](https://media.kunduz.com/media/sug-question-candidate/20200812011139231554-1461613.jpg?w=256)
Physics
Magnetic FieldTwo vectors A and B are such that A B C and I IBHCI Then the vectors A and B are 1 parallel 3 anti parallel 2 perpendicular 4 null vectors
![A rectangular loop carrying a current i is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and is in the plane of the loop If a steady current i is established in the wire the loop will 1 Rotate about an axis parallel to the wire 2 Move away from the wire 3 Move towards the wire](https://media.kunduz.com/media/sug-question-candidate/20200812090238545218-1881758.jpg?w=256)
Physics
Magnetic FieldA rectangular loop carrying a current i is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and is in the plane of the loop If a steady current i is established in the wire the loop will 1 Rotate about an axis parallel to the wire 2 Move away from the wire 3 Move towards the wire
![Find the magnetic induction due to a straight conductor of length 16 cm carrying current of 5 A at a distance of 6 cm from the mid point of conductor](https://media.kunduz.com/media/sug-question-candidate/20200812045432990477-1917690.jpg?w=256)
Physics
Magnetic FieldFind the magnetic induction due to a straight conductor of length 16 cm carrying current of 5 A at a distance of 6 cm from the mid point of conductor
![4 along the bisector of the 6 Magnetic field due to a small current carrying ring at some distance a on its axis is B from its center The magnetic field on the axis at a distance 4a from its center will be about 1 0 0156 B 3 0 25 B 2 4 0 5 B 0 125 B rrying](https://media.kunduz.com/media/sug-question-candidate/20200812203022427505-1920030.jpg?w=256)
Physics
Magnetic Field4 along the bisector of the 6 Magnetic field due to a small current carrying ring at some distance a on its axis is B from its center The magnetic field on the axis at a distance 4a from its center will be about 1 0 0156 B 3 0 25 B 2 4 0 5 B 0 125 B rrying
![63 If pulled out with a uniform velocity from the uniform magnetic field as shown in figure then which graph of induced current versus time is possible 1 X X B X X X X A XV X X X t 2 B](https://media.kunduz.com/media/sug-question-candidate/20200905070306423262-1975104.jpg?w=256)
Physics
Magnetic Field63 If pulled out with a uniform velocity from the uniform magnetic field as shown in figure then which graph of induced current versus time is possible 1 X X B X X X X A XV X X X t 2 B