Basic Physics Questions and Answers

114 A body is projected vertically up from ground After 2 seconds it is at a point P and further in took 4 seconds from P to reach ground Them height of point P above ground is g 10 m s 1 10 m 3 30 m 2 20 m 4 40 m
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114 A body is projected vertically up from ground After 2 seconds it is at a point P and further in took 4 seconds from P to reach ground Them height of point P above ground is g 10 m s 1 10 m 3 30 m 2 20 m 4 40 m
32 The radii of circular orbits of two satellites A and B of the earth are 4R and R respectively If the speed of satellite A is 3 V the the speed of satellite B will be a 3V 4 c 12 V Lo b 6 V d 3V 2 CBSE Pre 2010
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32 The radii of circular orbits of two satellites A and B of the earth are 4R and R respectively If the speed of satellite A is 3 V the the speed of satellite B will be a 3V 4 c 12 V Lo b 6 V d 3V 2 CBSE Pre 2010
ALLEN 13 For angles of projection of a projectile 45 0 and 45 0 the horizontal ranges described by the projectile are in the ratio of if 0 45 1 2 1 2 1 2 3 1 1 4 2 3 45 0 45 ca a af 0 45 1 2 1 3 1 1 8 fa 2 1 2 0
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ALLEN 13 For angles of projection of a projectile 45 0 and 45 0 the horizontal ranges described by the projectile are in the ratio of if 0 45 1 2 1 2 1 2 3 1 1 4 2 3 45 0 45 ca a af 0 45 1 2 1 3 1 1 8 fa 2 1 2 0
nal area h 10 cm eased to modulus locity of section cm and p filled Own in 20 is scible econd mental Q 29 A thermometer has a spherical bulb of volume 1 cm having 1 cm of mercury A long cylindrical capillary tube is connected to spherical bulb Volumetric coefficient of expansion of mercury is 1 8 x 10 K cross section area of capillary is 1 8 10 cm Ignoring expansion of glass cm far apart on the stem are marks indicating 1K temperature change mmmmmmm tutwulwinul
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nal area h 10 cm eased to modulus locity of section cm and p filled Own in 20 is scible econd mental Q 29 A thermometer has a spherical bulb of volume 1 cm having 1 cm of mercury A long cylindrical capillary tube is connected to spherical bulb Volumetric coefficient of expansion of mercury is 1 8 x 10 K cross section area of capillary is 1 8 10 cm Ignoring expansion of glass cm far apart on the stem are marks indicating 1K temperature change mmmmmmm tutwulwinul
14 Figure gives a system of logic gates From the study of truth table it can be found that to produce a high output 1 at R we must have X Y A X 0 Y 1 C X 1 Y 0 P O R B X 1 Y 1 D X 0 Y 0
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14 Figure gives a system of logic gates From the study of truth table it can be found that to produce a high output 1 at R we must have X Y A X 0 Y 1 C X 1 Y 0 P O R B X 1 Y 1 D X 0 Y 0
33 A string fixed at both ends is vibrating in the lowest mode of vibration for which a point at quarter of its length from one end is a point of maximum displacement The frequency of vibration in this mode is 100 Hz What will be the frequency emitted when it vibrates in the next mode such that this point is again a point of maximum displacement a 400 Hz c 600 Hz b 200 Hz d 300 Hz
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33 A string fixed at both ends is vibrating in the lowest mode of vibration for which a point at quarter of its length from one end is a point of maximum displacement The frequency of vibration in this mode is 100 Hz What will be the frequency emitted when it vibrates in the next mode such that this point is again a point of maximum displacement a 400 Hz c 600 Hz b 200 Hz d 300 Hz
3 89 At the time of total solar eclipse the spectrum of sol radiation will have MHT CE a a large number of dark Fraunhofer lines b a smaller number of dark Fraunhofer lines c po lines at all at 8 de Fraunhofer lines changed into bright coloured li
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3 89 At the time of total solar eclipse the spectrum of sol radiation will have MHT CE a a large number of dark Fraunhofer lines b a smaller number of dark Fraunhofer lines c po lines at all at 8 de Fraunhofer lines changed into bright coloured li
35 A certain body weighs 22 42 g and has a measured volume of 4 7 cc The possible errors in the measurement of mass and volume are 0 01 g and 0 1 cc Then maximum error in the density will be 2 d 0 02 22 c 0 2 CBSE PMT 91
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35 A certain body weighs 22 42 g and has a measured volume of 4 7 cc The possible errors in the measurement of mass and volume are 0 01 g and 0 1 cc Then maximum error in the density will be 2 d 0 02 22 c 0 2 CBSE PMT 91
The magnetic field at the centre of a circular current carrying loop of radius Ris B The magnetic field on its axis at a distance R from the centre is B The value of B B will be O 2 1 01 2 O 2 2 1
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The magnetic field at the centre of a circular current carrying loop of radius Ris B The magnetic field on its axis at a distance R from the centre is B The value of B B will be O 2 1 01 2 O 2 2 1
SolveLancer Test Which of the following can represent electric field due to a point charge at points X and Y X L Test a I IV b II III c I III d Only I a b C f 3 SolveLancer
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SolveLancer Test Which of the following can represent electric field due to a point charge at points X and Y X L Test a I IV b II III c I III d Only I a b C f 3 SolveLancer
2010 3 A tiny spherical oil drop carrying a net charge q is balanced in still air with a vertical uniform electric field of strength 81m x 105 Vm When the field is switched off the drop 7 ms 1 is observed to fall with terminal velocity 2 10 ms 2 viscosity of the air 1 8x 10 5 N sm 2 and the density of oil 900 kgm Given g 9 8 ms 3 AIEEE the magnitude of q is a 1 6 10 C c 4 8 10 9 C b 3 2x 10 9 C d 8 0x C
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2010 3 A tiny spherical oil drop carrying a net charge q is balanced in still air with a vertical uniform electric field of strength 81m x 105 Vm When the field is switched off the drop 7 ms 1 is observed to fall with terminal velocity 2 10 ms 2 viscosity of the air 1 8x 10 5 N sm 2 and the density of oil 900 kgm Given g 9 8 ms 3 AIEEE the magnitude of q is a 1 6 10 C c 4 8 10 9 C b 3 2x 10 9 C d 8 0x C
ALLEN Two masses m 2kg and m 5kg are moving 19 on a frictionless surface with velocities 10m s and 3 m s respectively m is ahead of m An ideal spring of spring constant k 1120 N m is attached on the back side of m The maximum compression of the spring will be 1 0 51 m 2 0 062 m m2kgm 5 kg i thi fram 10 m s 3 m s at m m m sit e 3 xi fein k 1120 Nm ere mi xun fenfum 1 0 51 m 3 0 25 m m 2 0 062 m 4 0 72 m V
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ALLEN Two masses m 2kg and m 5kg are moving 19 on a frictionless surface with velocities 10m s and 3 m s respectively m is ahead of m An ideal spring of spring constant k 1120 N m is attached on the back side of m The maximum compression of the spring will be 1 0 51 m 2 0 062 m m2kgm 5 kg i thi fram 10 m s 3 m s at m m m sit e 3 xi fein k 1120 Nm ere mi xun fenfum 1 0 51 m 3 0 25 m m 2 0 062 m 4 0 72 m V
A plane mirror is placed at the bottom of a tank containing a liquid of refractive index P is a small object at a height h above the mirror An observer O vertically above P outside the liquid sees P and its image in the mirror The apparent distance between these two will be O
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A plane mirror is placed at the bottom of a tank containing a liquid of refractive index P is a small object at a height h above the mirror An observer O vertically above P outside the liquid sees P and its image in the mirror The apparent distance between these two will be O
A light rigid rod connected with two particles masses m and 2m rotates in vertical plane agar horizontal and vertical surfaces shown in the figure The angular momentum of particle 1 relative to 2 1 2mvl Cose mvl 0 m 2m 2 2 mviCose mvl
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A light rigid rod connected with two particles masses m and 2m rotates in vertical plane agar horizontal and vertical surfaces shown in the figure The angular momentum of particle 1 relative to 2 1 2mvl Cose mvl 0 m 2m 2 2 mviCose mvl
Momentum of a photon in a beam of light of wavelength 6000 and intensity 100 W m will be 1 23 x 10 27 kg ms 1 2 12 10 27 kg ms 1 1 105 x 10 27 kg ms 1 3 3 x 10 27 kg ms 1
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Momentum of a photon in a beam of light of wavelength 6000 and intensity 100 W m will be 1 23 x 10 27 kg ms 1 2 12 10 27 kg ms 1 1 105 x 10 27 kg ms 1 3 3 x 10 27 kg ms 1
In a metre bridge when the resistance in the left gap is 40 and an unknown resistance in the right gap the balance point is obtained at 40 cm from the zero end On shunting the unknown resistance with 30 find the shift in balance point on the bridge wire 66 6 cm 26 6 cm 11 cm 32 cm
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In a metre bridge when the resistance in the left gap is 40 and an unknown resistance in the right gap the balance point is obtained at 40 cm from the zero end On shunting the unknown resistance with 30 find the shift in balance point on the bridge wire 66 6 cm 26 6 cm 11 cm 32 cm
A particle is moving along x axis whose acceleration 4 is given by a 3x4 where x is location of the particle At t 0 the particle is at rest at 4 3 m The distance travelled by the particle in 5 s is 1 10 m 2 32 m 2 7ora
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A particle is moving along x axis whose acceleration 4 is given by a 3x4 where x is location of the particle At t 0 the particle is at rest at 4 3 m The distance travelled by the particle in 5 s is 1 10 m 2 32 m 2 7ora
Q 17 If n 1 then the dependence of frequency of a photon emitted as a result of transition of electron from nth orbit to n 1 th orbit on n will be 1 1 vx n 2 v 1 n
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Q 17 If n 1 then the dependence of frequency of a photon emitted as a result of transition of electron from nth orbit to n 1 th orbit on n will be 1 1 vx n 2 v 1 n
Energy levels A B C of a certain atom correspond to in creasing values of energy i e E E E If 2 2 and 2 are the wavelengths of radiations corresponding to the tran sitions C to B B to A and C to A respectively then B a 3 2 12 2 2 b 23 2 2 c 2 2 23 0 d 2 2 2 C B 2 23 A
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Energy levels A B C of a certain atom correspond to in creasing values of energy i e E E E If 2 2 and 2 are the wavelengths of radiations corresponding to the tran sitions C to B B to A and C to A respectively then B a 3 2 12 2 2 b 23 2 2 c 2 2 23 0 d 2 2 2 C B 2 23 A
bulb of 3 3 cm 29 A thermometer has a spheric volume 1 cm having 1 cm of mercury A long cylindrical capillary tube is connected to spherical bulb Volumetric coefficient of expansion of mercury is 1 8 x 10 K cross section area of capillary is 1 8 x 104 cm Ignoring expansion of glass cm far apart on the stem are marks indicating 1K temperature change m
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bulb of 3 3 cm 29 A thermometer has a spheric volume 1 cm having 1 cm of mercury A long cylindrical capillary tube is connected to spherical bulb Volumetric coefficient of expansion of mercury is 1 8 x 10 K cross section area of capillary is 1 8 x 104 cm Ignoring expansion of glass cm far apart on the stem are marks indicating 1K temperature change m
Consider a two particle system with particles having 6 masses m and my If the first particle is pushed towards the centre of mass through a distance d by what distance should the second particle be moved so as to keep the centre of mass at the same position 1 2 3 m mi mi m m 4 d DER TEST SERIES JOINT PACKAGE COURSE T UG 2021 13092020 1 2 encari Gian aut a fact ang fer f 3aftafda to ma mi 4 d d mi m m 4 2g and f Space for Rough Work ferg Grie i C 09980MD31032 LTS Pages
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Consider a two particle system with particles having 6 masses m and my If the first particle is pushed towards the centre of mass through a distance d by what distance should the second particle be moved so as to keep the centre of mass at the same position 1 2 3 m mi mi m m 4 d DER TEST SERIES JOINT PACKAGE COURSE T UG 2021 13092020 1 2 encari Gian aut a fact ang fer f 3aftafda to ma mi 4 d d mi m m 4 2g and f Space for Rough Work ferg Grie i C 09980MD31032 LTS Pages
a C in south west direction The displacement of the person from the origin will be 10 m along north 10 m along west b d 10 m long south Zero W N
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a C in south west direction The displacement of the person from the origin will be 10 m along north 10 m along west b d 10 m long south Zero W N
Problem Consider a two dimensional square lattice with one atom of mass m per lattice point interacting with 4k qa only nearest neighbours with force constant k Take the phonon dispersion curve to be m sin 2 At high temperature kT ho the mean square displacement of an atom from its equilibrium position will be a kT k b 2KT c 4k 2kT d 4
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Problem Consider a two dimensional square lattice with one atom of mass m per lattice point interacting with 4k qa only nearest neighbours with force constant k Take the phonon dispersion curve to be m sin 2 At high temperature kT ho the mean square displacement of an atom from its equilibrium position will be a kT k b 2KT c 4k 2kT d 4
b The molecules of a gas have two states of internal energy with statistical weights gi g2 and energies 0 respectively Calculate the contribution of these states to the specific heat of the gas 4 c Two states with energy difference 4 83 x 10 21 joule occur with relative probability e Calculate the temperature Given k 1 38 10 23 J K 3
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b The molecules of a gas have two states of internal energy with statistical weights gi g2 and energies 0 respectively Calculate the contribution of these states to the specific heat of the gas 4 c Two states with energy difference 4 83 x 10 21 joule occur with relative probability e Calculate the temperature Given k 1 38 10 23 J K 3
A symmetric double convex lens is cut in two equal parts by a plane perpendicular to the principal axis If the power of the original lens was 4 D the power of a cut lens will be Select an answer A 2D B C D 3 D 4 D 5 D
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A symmetric double convex lens is cut in two equal parts by a plane perpendicular to the principal axis If the power of the original lens was 4 D the power of a cut lens will be Select an answer A 2D B C D 3 D 4 D 5 D
of sphere Cis A are three identical smooth sphere placed on frictionless inclined plane as shown in figure then F B D 4 N 60 mg B N 90 D mg 00 IN C NN 60 mg D N 60 mg N
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of sphere Cis A are three identical smooth sphere placed on frictionless inclined plane as shown in figure then F B D 4 N 60 mg B N 90 D mg 00 IN C NN 60 mg D N 60 mg N
Two cells of the same e m f e but different internal resistances r and r are connected in series with an external resistance R The potential drop across the first cell is found to be zero The external resistance R is A 1 1 C 2 B 1 12 D r 1 FF 6 r www R
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Two cells of the same e m f e but different internal resistances r and r are connected in series with an external resistance R The potential drop across the first cell is found to be zero The external resistance R is A 1 1 C 2 B 1 12 D r 1 FF 6 r www R
If one were to apply Bohr model to a particle of mass m and charge q moving in a plane under the influence of a magnetic field B the energy of the charged particle in the nth level will be a n hqB 2 m c hqB 8 m hqB b 4km hqB d 3 TM
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If one were to apply Bohr model to a particle of mass m and charge q moving in a plane under the influence of a magnetic field B the energy of the charged particle in the nth level will be a n hqB 2 m c hqB 8 m hqB b 4km hqB d 3 TM
The energy flux of the light emitted by a source of light is 50 Wm 2 This light energy falls on a plate of area 5 cm which completely absorbs this energy Find the force exerted on the plate if the plate is exposed to light for 10 minutes If the plate is replaced by another plate of same area but which completely reflects the light falling on it Find the force exerted on the plate in this case 0 11 16 6 X 10 11
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The energy flux of the light emitted by a source of light is 50 Wm 2 This light energy falls on a plate of area 5 cm which completely absorbs this energy Find the force exerted on the plate if the plate is exposed to light for 10 minutes If the plate is replaced by another plate of same area but which completely reflects the light falling on it Find the force exerted on the plate in this case 0 11 16 6 X 10 11
7 i Calculate Einstein s frequency for copper for which 0230 K Given h 6 6 10 34 J sec Boltzmann constant k 1 37 x 10 23 Joule K E ii Use result i to show that the classical result C 3R should be valid for copper if T 230 K i Finstein s frequency s bu
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7 i Calculate Einstein s frequency for copper for which 0230 K Given h 6 6 10 34 J sec Boltzmann constant k 1 37 x 10 23 Joule K E ii Use result i to show that the classical result C 3R should be valid for copper if T 230 K i Finstein s frequency s bu
Two blocks A and B of mass m and 2m are connected by a massless spring of force con stant k They are placed on a smooth hori zontal plane Spring is stretched by an amount x and then released The relative velocity of the blocks when the spring comes to its natural length is ADRURORS A C 3k 2m 2kx m X B D B 2k 3m 3km V 2x X
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Two blocks A and B of mass m and 2m are connected by a massless spring of force con stant k They are placed on a smooth hori zontal plane Spring is stretched by an amount x and then released The relative velocity of the blocks when the spring comes to its natural length is ADRURORS A C 3k 2m 2kx m X B D B 2k 3m 3km V 2x X
16 An electric current of 16 A exists in a metal wire of cross section 106 m and length 1 m Assuming one free electron per atom The drift speed of the free electrons in the wire will be Density of metal 5 x 10 kg m atomic weight 60 A 5 x 10 m s B 2 x 10 m s D 7 5 x 10 3 m s C 4 x 10 m s
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16 An electric current of 16 A exists in a metal wire of cross section 106 m and length 1 m Assuming one free electron per atom The drift speed of the free electrons in the wire will be Density of metal 5 x 10 kg m atomic weight 60 A 5 x 10 m s B 2 x 10 m s D 7 5 x 10 3 m s C 4 x 10 m s
A spectrometer gives the following reading when used to measure the angle of a prism A Main scale reading 58 5 degree Vernier scale reading 09 divisions Given that 1 division on main scale corresponds to 0 5 degree Total divisions on the vernier scale is 30 and match with 29 divisions of the main scale The angle of the prism from the above data a 58 59 Degree c 58 65 Degree AIEEE 2012 b 58 77 Degree d 59 Degree
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A spectrometer gives the following reading when used to measure the angle of a prism A Main scale reading 58 5 degree Vernier scale reading 09 divisions Given that 1 division on main scale corresponds to 0 5 degree Total divisions on the vernier scale is 30 and match with 29 divisions of the main scale The angle of the prism from the above data a 58 59 Degree c 58 65 Degree AIEEE 2012 b 58 77 Degree d 59 Degree
A power supply of fixed emf E is connected to a variable resistor resistance R and an ammeter of resistance RA The internal resistance of the supply is r The potential difference between the terminals of the power supply in closed circuit is denoted by V and the current in the circuit is denoted by I A graph is obtained between V and I by drawing varying amount of current from the supply The correct V I graph for the given situation is TO 2008
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A power supply of fixed emf E is connected to a variable resistor resistance R and an ammeter of resistance RA The internal resistance of the supply is r The potential difference between the terminals of the power supply in closed circuit is denoted by V and the current in the circuit is denoted by I A graph is obtained between V and I by drawing varying amount of current from the supply The correct V I graph for the given situation is TO 2008
45 Susceptibility of Mg at 300 K is 1 2 10 45 The temperature at which susceptibility will be 1 8 10 is 1 450 K 2 200 K 3 375 K 4 None of these Mg 300 K 1 2 10 fa 1 8 10 1 450 K 2 200 K 3 375 K 4
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45 Susceptibility of Mg at 300 K is 1 2 10 45 The temperature at which susceptibility will be 1 8 10 is 1 450 K 2 200 K 3 375 K 4 None of these Mg 300 K 1 2 10 fa 1 8 10 1 450 K 2 200 K 3 375 K 4
The fundamental frequency of a sonometer wire increases by 5 Hz if its tension is in creased by 21 Instead if the length of wire is decreased by 10 than the fundamental frequency becomes B 50 Hz D None of these A 45 45 Hz C 55 55 Hz
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The fundamental frequency of a sonometer wire increases by 5 Hz if its tension is in creased by 21 Instead if the length of wire is decreased by 10 than the fundamental frequency becomes B 50 Hz D None of these A 45 45 Hz C 55 55 Hz
Where it is used Explain with diagram working of that device State gauss s theorem Use it to find electric field due infinite line of charg What is the effect on electric field when charge density gets double a distance between point and line of charge is half
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Where it is used Explain with diagram working of that device State gauss s theorem Use it to find electric field due infinite line of charg What is the effect on electric field when charge density gets double a distance between point and line of charge is half
Read the following carefully A Enzymes are denatured at high temperature but in certain exceptional organisms they are effective even at temperature 80 90 C B Enzymes are highly specific C Most enzymes are proteins 6 Enzymes require optimum pH for maximal activity How many is are wrong 1 3 4 B
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Read the following carefully A Enzymes are denatured at high temperature but in certain exceptional organisms they are effective even at temperature 80 90 C B Enzymes are highly specific C Most enzymes are proteins 6 Enzymes require optimum pH for maximal activity How many is are wrong 1 3 4 B
A uniform magnetic field of magnitude 0 20 T exists in space from east to west With what speed should a particle of mass 0 010 g and having a charge 1 0 x 10 5 C be projected from south to north so that it moves with a uniform velocity A 48 m s C 47 m s B 49 m s D 50 m s
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A uniform magnetic field of magnitude 0 20 T exists in space from east to west With what speed should a particle of mass 0 010 g and having a charge 1 0 x 10 5 C be projected from south to north so that it moves with a uniform velocity A 48 m s C 47 m s B 49 m s D 50 m s
91 The radius of the nucleus with nucleon 9 number 2 is 1 5 x 10 15m then the radius of nucleus with nucleon number 54 will be A 3 x 10 15 m C 6 x 10 15 m B 4 5 x 10 15m D 9 5 10 15 m
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91 The radius of the nucleus with nucleon 9 number 2 is 1 5 x 10 15m then the radius of nucleus with nucleon number 54 will be A 3 x 10 15 m C 6 x 10 15 m B 4 5 x 10 15m D 9 5 10 15 m
A car is fitted with a convex side view mirror of focal length 20 cm A second car 2 8 m behind the first car is overtaking the first car at a relative speed of 15 ms The speed of the image of the second car seen in the mirror of the first one is 1 10 c 10 ms a ms b I ms 15 d 15 ms
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A car is fitted with a convex side view mirror of focal length 20 cm A second car 2 8 m behind the first car is overtaking the first car at a relative speed of 15 ms The speed of the image of the second car seen in the mirror of the first one is 1 10 c 10 ms a ms b I ms 15 d 15 ms
07 A square of side a is cut from a square of side 2a as shown in the figure Mass of this square with hole is M Then its moment of inertia about an axis passing through its CM and perpendicular to its plane will be A Ma 6 2a B 2a 2Ma 6
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07 A square of side a is cut from a square of side 2a as shown in the figure Mass of this square with hole is M Then its moment of inertia about an axis passing through its CM and perpendicular to its plane will be A Ma 6 2a B 2a 2Ma 6
5 A beam of light of wavelength 600 nm from a distant source falls on a single slit 1 00 mm wide and the resulting diffrac tion pattern is observed on a screen 2 m away The distance between the first dark fringes on either side of the central bright fringe is xx104m Find the value of x
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5 A beam of light of wavelength 600 nm from a distant source falls on a single slit 1 00 mm wide and the resulting diffrac tion pattern is observed on a screen 2 m away The distance between the first dark fringes on either side of the central bright fringe is xx104m Find the value of x
An electron initially at rest is accelerated through a potential difference of 200 volt so that it acquires a velocity 8 4 x 106 m s The value of e m of electron will be A 2 76 x 10 2 C kg B 1 76 x 10 C kg C 0 76 x 10 2 C kg D None of these
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An electron initially at rest is accelerated through a potential difference of 200 volt so that it acquires a velocity 8 4 x 106 m s The value of e m of electron will be A 2 76 x 10 2 C kg B 1 76 x 10 C kg C 0 76 x 10 2 C kg D None of these
Question 1 Answer the following questions very briefly 1 Forces always occur in pairs 2 Mass in motion 3 According to It seems reasonable that acceleration should be inversely proportional to the mass of the body 4 No force is needed to keep an object moving with constant velocity was
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Question 1 Answer the following questions very briefly 1 Forces always occur in pairs 2 Mass in motion 3 According to It seems reasonable that acceleration should be inversely proportional to the mass of the body 4 No force is needed to keep an object moving with constant velocity was
Three resistances are in parallel The currents in the first two resistors are 1A and 2 A The voltage across the third resistor is 100 volts The total power dissipated is 500 watts Determine total resistance of the circuit 10 ohm 20 ohm 30 ohm 40 ohm
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Three resistances are in parallel The currents in the first two resistors are 1A and 2 A The voltage across the third resistor is 100 volts The total power dissipated is 500 watts Determine total resistance of the circuit 10 ohm 20 ohm 30 ohm 40 ohm
17 A body initially at rest and sliding along a frictio track from a height h as shown in the figure completes a vertical circle of diameter AB D height h is equal to 3 A D
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17 A body initially at rest and sliding along a frictio track from a height h as shown in the figure completes a vertical circle of diameter AB D height h is equal to 3 A D
8 A charge Q is uniformly distributed over a large plastic plate The electric field at a point P close to the centre of the plate is 10 V m If the plastic plate is replaced by a copper plate of the same geometrical dimensions and carrying the same charge Q the electric field at the point P will become 1 Zero 2 5 V m 3 10 V m 4 20 V m
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8 A charge Q is uniformly distributed over a large plastic plate The electric field at a point P close to the centre of the plate is 10 V m If the plastic plate is replaced by a copper plate of the same geometrical dimensions and carrying the same charge Q the electric field at the point P will become 1 Zero 2 5 V m 3 10 V m 4 20 V m
eus ent in triton mbers P v rm into 2He not allowed because of ins a b Fusion processes are impossible at ordinary temperatures and pressures nuclei are positively charged and nuclear forces are short range strongest forces 0 9 Samples of two radioactive nuclides A and B are taken and are the disintegration constants of A and B respectively In which of the following cases the two samples can simultaneously have the same decay rate at any time a Initial rate of decay of A is twice the initial rate of decay of B and A Ag b Initial rate of decay of A is twice the initial rate of decay of B and AA B c Initial rate of decay of B is twice the initial rate of decay of A and Ag d Initial rate of decay of B is same as the rate of decay of A att 2h and Ag A Ans b d The two samples of the two radioactive nuclides A and B can simultaneously have the decay rate at any time if initial rate of decay of A is twice the initial rate of decay of Also when initial rate of decay of B is same as rate of decay of A att 2har dioactive samples A and B with
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eus ent in triton mbers P v rm into 2He not allowed because of ins a b Fusion processes are impossible at ordinary temperatures and pressures nuclei are positively charged and nuclear forces are short range strongest forces 0 9 Samples of two radioactive nuclides A and B are taken and are the disintegration constants of A and B respectively In which of the following cases the two samples can simultaneously have the same decay rate at any time a Initial rate of decay of A is twice the initial rate of decay of B and A Ag b Initial rate of decay of A is twice the initial rate of decay of B and AA B c Initial rate of decay of B is twice the initial rate of decay of A and Ag d Initial rate of decay of B is same as the rate of decay of A att 2h and Ag A Ans b d The two samples of the two radioactive nuclides A and B can simultaneously have the decay rate at any time if initial rate of decay of A is twice the initial rate of decay of Also when initial rate of decay of B is same as rate of decay of A att 2har dioactive samples A and B with
Spring pendulum is on the rotating table Initial angular velocity of the table is w and time period of pendulum is To Now the angular velocity of table becomes 2w then new time period will 1 2T 2 T 2 Remains same 12
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Spring pendulum is on the rotating table Initial angular velocity of the table is w and time period of pendulum is To Now the angular velocity of table becomes 2w then new time period will 1 2T 2 T 2 Remains same 12