1.Electric charges when remain at rest under action of electric force is calleda) electric fluxb)electric field of linesc) electrostaticsd) electric field
Answer. Electrostatics
Answer. Electrostatics
2.Electric charges between two bodies can be produced bya)stickingb)iolingc)rubbingd) none of these
Answer. rubbing
Answer. rubbing
3.The minimum charges exist by a body isa)1.6×10^-20 Cb)1.6X10^-18 Cc)1.6X10^-19 Cd)none of these
c)1.6X10^-19 C
c)1.6X10^-19 C
4.Gauss’s law isa) Φ=q/ε0b)Φ=qε0c)Φ=ε0/qd)none of these
Answer.Φ=q/ε0
Answer.Φ=q/ε0
5.The electric flux through a Gaussian surface is ……….of the shape of the surfacea) Independentb)proportionalc)dependentd)none of these
Answer. independent
Answer. independent
6.Electric potential is eqaual toa) q/Wb)W/qc)qWd) √wq
Answer. W/q
Answer. W/q
7.On moving a charge of 20C by 2 cm, 2J of work is done. Then the potential difference between the points isa) 0.1Vb)8Vc)2Vd)0.5V
Answer. 0.1
Answer. 0.1
8.What is the angle between electric field and equipotential surface?a) 900b)00c)0 to 900d) 0 to 1800
Answer. 90 degree
Answer. 90 degree
9.If a dielectric slab is introduced in between the two plates of capacitor then its capacitancea) increasesb) decreasesc) remains samed) becomes zero
Answer. increases
Answer. increases
10. In a region of constant potentiala) the electric field is uniformb) the electric field is zeroc)the electric field is infinited) becomes zero
Answer. b) the electric field is zero
Answer. b) the electric field is zero
11.The capacitance of a spherical capacitor is directly proportional to itsa)radiusb)1/ε0c)1/qd) none of these
Answer. radius
Answer. radius
12. A 1F Capacitor can store…….. charge at 1 volt.a)1 coulombb) 2 coulombc)6.25×1018 coulombd) none of these
Answer. 1 coulomb
Answer. 1 coulomb
13.The ratio of electric flux density to electric field intensity is known asa) Gravitational constantb) Dielectric constantc) both a and bd)none of these
Answer. dielectric constant
Answer. dielectric constant
14. A charge on a body is 100nC then how many electrons are present on the body?a)6.25×10^27b)1.6×10^19c)6.25×10^28d)6.25×10^11
Answer.d)6.25×10^11
Answer.d)6.25×10^11
15. A charged Q is enclosed by a Gaussian spherical surface of radius R. If the radius is doubled then outward electric flux willa) decreased to halfb) increased two timesc) remains constantd) increase four times