Page 1 : 1., Question, , Charge is a, , Type, , multiple_choice, , Option, , Scalar quantity, , correct, , Option, , vector quantity, , incorrect, , Option, , tensor quantity, , incorrect, , Option, , dimensionless, , incorrect, , Solution, , (a) Charge is a scalar quantity, , Marks, , 1, , 2., Question, , Dimensional formula for charge is, , Type, , multiple_choice, , Option, , M1 L0 T1 A–1, , incorrect, , Option, , M0 L0 T1 A1, , correct, , Option, , M1 L1 T1 A1, , incorrect, , Option, , M1 L–2 T–1, , incorrect, , Solution, , (b), , 0, , I, , Marks, 3., Question, , 1, , 0, , If a glass rod is rubbed with silk it acquires positive charge, because

Page 2 : Type, , multiple_choice, , Option, , protons are added to it, , incorrect, , Option, , protons are removed from, it, , incorrect, , Option, , electrons are added to it, , incorrect, , Option, , electrons are removed from correct, it, , Solution, , (d) Electrons are removed from it so, it acquires, positive charge., , Marks, , 1, , 4., Question, , The existance of a negative charge on a body implies that it has, , Type, , multiple_choice, , Option, , lost some of its electrons, , incorrect, , Option, , lost some of its protons, , incorrect, , Option, , acquires some electrons, from outside, , correct, , Option, , acquires some protons from incorrect, outside, , Solution, , (c): The existance of a negative charge on a body, implies that it has acquire some electrons, from outside., , Marks, , 1, , 5., Question, , An isolated conducting sphere is given positive charge. Its mass, , Type, , multiple_choice, , 0, , 0

Page 3 : Option, , increases, , incorrect, , Option, , decreases, , correct, , Option, , remains same, , incorrect, , Option, , mass is not involved, , incorrect, , Solution, , (b): Positive charge means removal of electrons, so mass will decrease., , Marks, , 1, , 6., Question, , 0, , When a solid body is negatively charged by friction , it means, that body has, , Type, , multiple_choice, , Option, , acquired excess of, electrons, , correct, , Option, , lost some protons, , incorrect, , Option, , acquired some electrons, incorrect, and lost a lesser number of, protons, , Option, , lost some positive ions, , incorrect, , Marks, , 1, , 0, , 7., Question, , Charges resides on the, , Type, , multiple_choice, , Option, , outer surface of the charged correct, conductor, , Option, , inner surface of the charged incorrect, conductor, , Solution

Page 4 : Option, , inner as well as outer, surface of the charged, conductor, , incorrect, , Option, , at the centre of charged, surface, , incorrect, , Solution, , (a): Charge resides on outer surface of the charged conductor., , Marks, , 1, , 8., Question, , 0, , The fact that electric charges are integral multiples of the, fundamental electronic charge was proved experimentally by, , Type, , multiple_choice, , Option, , Planck, , incorrect, , Option, , J.J. Thomson, , incorrect, , Option, , Einstein, , incorrect, , Option, , Millikan, , correct, , Solution, , (d):, , Marks, , 1, , 9., Question, , Select the correct alternative, , Type, , multiple_choice, , Option, , the charge gain by the, uncharged body from a, charged body due to, conduction is equal to, charge initially present, , incorrect, , Option, , the magnitude of charge, increased with, the velocity of charge, , incorrect, , Miilikan., 0

Page 5 : Option, , charge can not exist, without matter although, matter can exist without, charge, , correct, , Option, , attraction is the true test of, electrification, , incorrect, , Solution, , (c): charge can not exist without matter although matter can, exist without charge, , Marks, , 1, , 10., Question, , Electric charge on a body at rest produced, , Type, , multiple_choice, , Option, , electric field, , correct, , Option, , magnetic field, , incorrect, , Option, , both 'a' and 'b', , incorrect, , Option, , gravitational field, , incorrect, , Solution, , (a) Electric charge on a body at rest produces electric field, , Marks, , 1, , 11., Question, , An electric charge in uniform motion produce, , Type, , multiple_choice, , Option, , an electric field only, , incorrect, , Option, , a magnetic field only, , incorrect, , Option, , both electric and magnetic, field, , correct, , Option, , neither electric nor, , incorrect, , 0, , 0

Page 6 : magnetic field, Solution, , (c) An electric charge in uniform motion produces both electric, and magnetic field., , Marks, , 1, , 12., Question, , Electromagnetic energy is radiated by, , Type, , multiple_choice, , Option, , stationary charge, , incorrect, , Option, , charge in uniform motion, , incorrect, , Option, , an accelerated charge only, , correct, , Option, , an accelerated charge and a incorrect, charge in uniform motion, both, , Solution, , (c) Electromagnetic energy is radiated by an accelerated charge, body, , Marks, , 1, , 13., Question, , The static electricity is produced due to the, , Type, , multiple_choice, , Option, , friction, , incorrect, , Option, , induction, , incorrect, , Option, , both 'a' and 'b', , correct, , Option, , neither 'a' nor ‘b’, , incorrect, , Solution, , (c) both friction and induction, , Marks, , 1, , 0, , 0, , 0

Page 7 : 14., Question, , When a body is charged by induction, then the body, , Type, , multiple_choice, , Option, , gets electrons in excesses, , incorrect, , Option, , does not lose any charge, , correct, , Option, , loses whole of the charge, on it, , incorrect, , Option, , loses part of the charge on, it, , incorrect, , Solution, , (b) Does not lose any charge, , Marks, , 1, , 15., Question, , If a body is positively charged then it has, , Type, , multiple_choice, , Option, , deficiency of electrons, , correct, , Option, , excess of electrons, , incorrect, , Option, , excess of neutrons, , incorrect, , Option, , deficiency of neutrons, , incorrect, , Solution, , (a) deficiency of electrons, , Marks, , 1, , 16., Question, , Which of the following is the unit of electric charge, , Type, , multiple_choice, , Option, , coulomb/volt, , 0, , 0, , incorrect

Page 8 : Option, , coulomb, , incorrect, , Option, , ampere-second, , incorrect, , Option, , both ‘b’ and ‘c’, , correct, , Solution, , (d) both ‘b’ and ‘c, , Marks, , 1, , 17., Question, , Frictional electricity is produced on two bodies due to, , Type, , multiple_choice, , Option, , loss of electrons by one, body, , incorrect, , Option, , loss of proton by one body, , incorrect, , Option, , loss of electrons by one, body and equal number of, electrons gained by other, body, , correct, , Option, , loss of proton by one body, and equal no. of protons, gained by other body, , incorrect, , Solution, , (c) loss of electrons by one body and equal number of electrons, gained by other body, , Marks, , 1, , 18., Question, , In C.G.S. system e.s.u. of charge is, , Type, , multiple_choice, , Option, , stat coulomb, , incorrect, , Option, , frankline, , incorrect, , 0, , 0

Page 9 : Option, , absolute coulomb, , incorrect, , Option, , ‘a’ and ‘b’, , correct, , Solution, , (d) both stat coulomb and franklile, , Marks, , 1, , 19., Question, , Dry hair when rubbed with comb acquire, , Type, , multiple_choice, , Option, , positive charge and comb, acquire equal negative, charge, , correct, , Option, , no charge, , incorrect, , Option, , negative charge and comb, acquires equal positive, charge, , incorrect, , Option, , positive charge and comb, acquires more negative, charge, , incorrect, , Solution, , (a) positive charge and comb acquire equal negative charge, , Marks, , 1, , 20., Question, , 0, , 0, , Any amount of either positive or negative charges produced by, friction must be equal to the charge on integral number of, , Type, , multiple_choice, , Option, , protons, , incorrect, , Option, , electrons, , correct, , Option, , both protons and electrons, , incorrect, , Option, , alpha particles, , incorrect

Page 10 : Solution, , (b) Amount of charge produced by friction must be equal to, charge on integral number electrons, , Marks, , 1, , 21., Question, , 0, , The numbers of electrons that should be removed to produce a, charge of 1C on conductor is, , Type, , multiple_choice, , Option, , 1.6 × 1010, , Option, , × 1019, , ., , incorrect, correct, , Option, , 1.6 × 10–10, , incorrect, , Option, , 1019, , incorrect, , Solution, , (b) Q = n.e. l = ne, , Marks, , 1, , 22., Question, , The magnitude of electrostatic unit of charge in S.I. system is, , Type, , multiple_choice, , Option, , 1.602 × 10–19 C, , incorrect, , Option, , 0.33 × 10–9 C, , correct, , Option, , 3 × 108 C, , incorrect, , Option, , 3 × 10–19 C, , incorrect, , Solution, Marks, , 0, , (b), 1, , 0

Page 11 : 23., Question, , A sure test of electrification is, , Type, , multiple_choice, , Option, , attraction, , incorrect, , Option, , repulsion, , correct, , Option, , friction, , incorrect, , Option, , induction, , incorrect, , Solution, , (b) Repulsion is a sure test of electrification because (here will, be attraction between an uncharged body and a charged body but, repulsion will be always between two similarly charged body., , Marks, , 1, , 24., Question, , 0, , When 1012 electrons are removed from a nutral metal sphere, the, charge on the sphere becomes, , Type, , multiple_choice, , Option, , 0.16 μC, , correct, , Option, , –0.16 μC, , incorrect, , Option, , 32 μC, , incorrect, , Option, , –32 μC, , incorrect, , Solution, , (a) Q = ne = 1012 ×1.6 ×10–19, = 0.16 × 10–6 = 0.16 μC, , Marks, , 1, , 25., Question, Type, , 0, , A charged conductor has 1500 electrons in excess. The quantity, of the charge on the conductor is, multiple_choice

Page 12 : Option, , 2.4 × 10–16 C, , correct, , Option, , 4.4 × 10–16 C, , incorrect, , Option, , 5.5 × 10–16 C, , incorrect, , Option, , 6.6 × 10–16 C, , incorrect, , Solution, , (a) Q = ne = 1500 × 1.6 × 10–19, = 2400 × 10–19 = 2.4 × 10–16 C, , Marks, , 1, , 26., Question, , 0, , When glass is rubbed with silk, glass loses 3× 1020 electrons., The charge acquired by silk is, , Type, , multiple_choice, , Option, , 48 C, , correct, , Option, , 57 C, , incorrect, , Option, , 1.6 C, , incorrect, , Option, , 300 C, , incorrect, , Solution, , (a) Q = ne = 3 × 10–19 = 1.6 × 10–19, = 4.8 × 10 = 48 Coulombs, , Marks, , 1, , 27., Question, , A body has –80 μC of charge. Number of electrons on it will be, , Type, , multiple_choice, , Option, , 8 × 10–5, , incorrect, , Option, , 80 × 1015, , incorrect, , Option, , 5 × 1014, , correct, , Option, , 1.28 × 10–17, , incorrect, , 0

Page 13 : Solution, , (c), Q = ne, 80 × 10–6 = n × 1.6 × 10–19, , Marks, 28., Question, , 1, , 0, , A polythene piece rubbed with wool is found to have a negative, charge of 4 × 10–7 C. Then, the number of electrons transferred, are, , Type, , multiple_choice, , Option, , 2.5 × 1012, , correct, , Option, , 9.1 × 10–31, , incorrect, , Option, , 3 × 108, , incorrect, , Option, , 3 × 10–19, , incorrect, , Solution, (a), Marks, 29., Question, , 1, , 0, , We can define the term charge density when distribution of, charge is, , Type, , multiple_choice, , Option, , non uniform, , incorrect, , Option, , uniform, , correct, , Option, , both 'a' and 'b’, , incorrect, , Option, , neither ‘a’ nor 'b', , incorrect, , Solution, , (b) uniform

Page 14 : Marks, , 1, , 0, , 30., Question, , Charge per unit area is called as, , Type, , multiple_choice, , Option, , linear charge density, , incorrect, , Option, , volume charge density, , incorrect, , Option, , surface charge density, , correct, , Option, , unit charge density, , incorrect, , Solution, , (c) surface charge density, , Marks, , 1, , 31., Question, , Volume charge density is, , Type, , multiple_choice, , Option, , one dimensional, , incorrect, , Option, , two dimensional, , incorrect, , Option, , three dimensional, , correct, , Option, , dimensionless, , incorrect, , Solution, , (c) three dimensional, , Marks, , 1, , 32., Question, , Linear charge density for circle of radius r is, , Type, , multiple_choice, , 0, , 0

Page 15 : Option, , Q, , correct, , Option, , Q, , incorrect, , Option, , Q, , incorrect, , Option, , Q, , incorrect, , Solution, , (a), , Q, , Marks, , 1, , 33., Question, , Unit of surface charge density is, , Type, , multiple_choice, , Option, , C/m, , incorrect, , Option, , C/m2, , correct, , Option, , C/m3, , incorrect, , Option, , C, , incorrect, , Solution, , (b) C/m2, , Marks, , 1, , 34., Question, , 0, , 0, , 10 μC charge is uniformaly distributed along a wire of length, 5m. Linear charge density is, , Type, , multiple_choice, , Option, , 2 × 10–6 C/m, , correct, , Option, , 5 × 10–6 C/m, , incorrect

Page 16 : Option, , 10 × 10–6 C/m, , incorrect, , Option, , 3 × 10–6 C/m, , incorrect, , Solution, Marks, 35., Question, , (a), 1, , 0, , A sphere of radius 10 cm is given a charge of 20 μC on its, surface. The charge density of the sphere is, , Type, , multiple_choice, , Option, , 3.185 × 10–6 C/m2, , incorrect, , Option, , 2 × 10–6 C/m2, , incorrect, , Option, , 3 × 10–9 C/m2, , incorrect, , Option, , 3.184 × 10–4 C/m2, , correct, , Solution, (d), Marks, 36., Question, , 1, , 0, , The law of force that governs the force between two electric, charges was discovered by, , Type, , multiple_choice, , Option, , Ampere, , incorrect, , Option, , Faraday, , incorrect, , Option, , Ohm, , incorrect, , Option, , Coulomb, , correct, , Solution, , (d): The law of force that governs the force between two, electric charges was discovered by Coulomb.

Page 17 : Marks, , 1, , 0, , 37., Question, , The electrostatic force between two point charges Q1 and Q2 at, separation r is given by, , r2, , . The constant K, , Type, , multiple_choice, , Option, , depends upon system of, units only, , incorrect, , Option, , depends upon medium, between the charges, , incorrect, , Option, , depends on both 'a' and 'b', , correct, , Option, , is independent of both 'a', and 'b', , incorrect, , Solution, , (c) depends oil both 'a' and 'b', , Marks, , 1, , 38., Question, , 0, , Coulomb's inverse square law gives the force of interaction, between static charges. It is restricted to, , Type, , multiple_choice, , Option, , spherical distribution of, charge, , Option, , linear distribution of charge incorrect, , Option, , only point charges, , correct, , Option, , any distribution of charge, , incorrect, , Solution, , (c) only point charges which are stationary, , Marks, , 1, , 39., , incorrect, , 0

Page 18 : Question, , Two charges are placed at a certain distance apart. A metallic, sheet is placed between them. What will happen to the force, between the charges, , Type, , multiple_choice, , Option, , increases, , incorrect, , Option, , decrease, , correct, , Option, , remain unchanged, , incorrect, , Option, , either 'a' or 'b', , incorrect, , Solution, , (b), m, , Marks, 40., Question, , Type, , 1, , 0, , Which of the following graphs represents the relationship, between the force between two point charges and the distance, between them, multiple_choice, , Option, , incorrect, , Option, , incorrect

Page 19 : Option, , incorrect, , Option, , correct, , Solution, Marks, 41., Question, , (d), , r, , 1, , 0, , A charge Q1, exerts a force on the second charge Q2. If a third, charge Q1 is brought near, the force of Q1 exerted on Q2, , Type, , multiple_choice, , Option, , decreases, , incorrect, , Option, , increases, , incorrect, , Option, , becomes zero, , incorrect, , Option, , remains constant, , correct, , Solution, , (d) If the third charge Q2 is brought near the force of Q1 exerted, on Q2 remains constant., , Marks, , 1, , 42., Question, , 0, , Two point charges placed at a certain distance r in air exert a, force F on each other. Then the distance r1 at which these, charges will experience the same force in a medium of dielectric

Page 20 : constant K is, Type, , multiple_choice, , Option, , r, r, K, r, , Option, Option, , incorrect, incorrect, correct, , √, Option, , r√, , Solution, , (c) Let two point charges be Q1 and Q2, , Marks, , 1, , 43., Question, , incorrect, , 0, , Coulomb's law is restricted to charged rods and balls only. This, statement is, , Type, , multiple_choice, , Option, , true, , incorrect, , Option, , false, , correct, , Option, , often true, , incorrect, , Option, , unpredictable, , incorrect

Page 21 : Solution, , (b) False, Coulomb’s law is restricted for point charges only, , Marks, , 1, , 44., Question, , 0, , The ratio of the force between two charges in vacuum at a, certain distance apart to that between the same charges and same, distance apart in a medium of permittivity ε is, , Type, , multiple_choice, , Option, , ε:1, , incorrect, , Option, , 1:ε, , incorrect, , Option, , ε0 : ε, , incorrect, , Option, , ε : ε0, , correct, , Solution, , (d), , Marks, , 1, , 45., Question, , 0, , When the distance between two charged particles is halved, the, force between them will become, , Type, , multiple_choice, , Option, , one half, , incorrect, , Option, , one-third, , incorrect, , Option, , double, , incorrect, , Option, , four times, , correct, , Solution, , (d)

Page 22 : F, , r, 2, , Marks, 46., Question, , 1, , 0, , The ratio of electric force (Fe) to gravitational force (Fg) acting, between two electrons will be, , Type, , multiple_choice, , Option, , 1 × 1035, , incorrect, , Option, , 2 × 1039, , incorrect, , Option, , 6 × 1045, , incorrect, , Option, , 4 × 1042, , correct, , Solution, , (d), e, , g, , Fe, Fg, , 2, , r2, 2

Page 23 : Marks, 47., Question, , 1, , 0, , Fg and Fe represent the gravitational and electrostatic force, respectively between two protons situated at some distance. The, ratio of Fe to Fg is of the order of, , Type, , multiple_choice, , Option, , 1036, , correct, , Option, , 100, , incorrect, , Option, , 10, , incorrect, , Option, , 10–43, , incorrect, , Solution, , (a), e, , g, , 2, , r2, , Fe, Fg, , Marks, 48., Question, , 1, , 2, , 0, , An electron and a proton are lying 10 cm apart. The ratio of Fe to, Fg for proton to electron is, , Type, , multiple_choice, , Option, , 1036, , incorrect, , Option, , 1043, , incorrect

Page 24 : Option, , 1039, , correct, , Option, , 1010, , incorrect, 2, , 2, e, , 10, , 2, , 10, e, , Gravitational Force is given by, Fg, , p, , r, , e, , 2, , 10, Fe, Fe, Fg, Marks, 49., Question, , 1, , 0, , The proton is 1836 times heavier than electron. The Coulomb's, force of repulsion between two protons at a certain distance, between them is F. Then the Coulomb force between two, electrons for same distance would be, , Type, , multiple_choice, , Option, , F, , correct, , Option, , –F, , incorrect, , Option, , Option, , F, 1836, , incorrect, 2, , F×(1836)2, , incorrect

Page 25 : Solution, , (a) Coulomb force is F as it is independent of mass, , Marks, , 1, , 50., Question, , 0, , Force between two charges, when placed in free space is 20 N. If, they are in a medium of relative permittivity 5, the force, between them will be, , Type, , multiple_choice, , Option, , 2N, , incorrect, , Option, , 4N, , correct, , Option, , 0.5 N, , incorrect, , Option, , 0.4 N, , incorrect, , Solution, , (b), K, , m, , m, , Marks, , 1, , 0