1.Electric charges when remain at rest under action of electric force is called a) electric flux b)electric field of lines c) electrostatics d) electric field

Answer. Electrostatics

2.Electric charges between two bodies can be produced by a)sticking b)ioling c)rubbing d) none of these

Answer. rubbing

3.The minimum charges exist by a body is a)1.6×10^-20 C b)1.6X10^-18 C c)1.6X10^-19 C d)none of these

c)1.6X10^-19 C

4.Gauss’s law is a) Φ=q/ε0 b)Φ=qε0 c)Φ=ε0/q d)none of these


5.The electric flux through a Gaussian surface is ……….of the shape of the surface a) Independent b)proportional c)dependent d)none of these

Answer. independent

6.Electric potential is eqaual to a) q/W b)W/q c)qW d) √wq

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 is a) 0.1V b)8V c)2V d)0.5V

Answer.   0.1

8.What is the angle between electric field and equipotential surface? a) 900 b)00 c)0 to 900 d) 0 to 1800

Answer.   90 degree

9.If a dielectric slab is introduced in between the two plates of capacitor then its capacitance a) increases b) decreases c) remains same d) becomes zero

Answer. increases

10. In a region of constant potential a) the electric field is uniform b) the electric field is zero c)the electric field is infinite d) becomes zero

Answer. b) the electric field is zero

11.The capacitance of a spherical capacitor is directly proportional to its a)radius b)1/ε0 c)1/q d) none of these

Answer. radius

12. A 1F Capacitor can store…….. charge at 1 volt. a)1 coulomb b) 2 coulomb c)6.25×1018 coulomb d) none of these

Answer. 1 coulomb

13.The ratio of electric flux density to electric field intensity is known as a) Gravitational constant b) Dielectric constant c) both a and b d)none of these

Answer. dielectric constant

14. A charge on a body is 100nC then how many electrons are present on the body? a)6.25×10^27 b)1.6×10^19 c)6.25×10^28 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 will a) decreased to half b) increased two times c) remains constant d) increase four times

Answer. remains constant