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Worksheets

Electrostatics

Total questions: 15

Worksheet time: 5mins

Name
Class
Date
1.

If voltage applied on a capacitor is increased from V to 2 V

a)

Q remains same, C doubled

b)

Q is doubled, C doubled

c)

C remains same, Q doubled

2.

A parallel plate capacitor stores a charge Q at a voltage V. suppose the area of the parallel plate capacitor and the distance between the plates are each doubled then which is the quantity that will change?

a)

Capacitance

b)

Energy density

c)

Charge

3.

Gauss's law valid for

a)

Any closed surface

b)

Regular closed surface

c)

Open surface

4.

The maximum electric field that a dielectric medium can withstand without breakdown is called

a)

Permittivity

b)

Dielectric constant

c)

Dielectric strength

5.

If in a parallel plate capacitor, which is connected to a battery we fill dielectrics in whole space of its plates then which of the following increases?

a)

Q & V

b)

V & E

c)

Q & C

6.

Van De graaff generator is used to

a)

Store electrical energy

b)

Build up high voltage

c)

Decelerate charged particle

7.

Assertion: dielectric polarization means formation of positive and negative charges inside the dielectric

Reason: free electrons are formed in this process

a)

Assertion is correct and reason is a correct explanation of assertion

b)

Assertion is correct but reason is not a correct explanation of assertion

c)

Assertion is correct, reason is incorrect

8.

Which of the following has permanent dipole moment

a)

O2

b)

N2

c)

H2O

9.

1 pF is equal to

a)

10^-6 F

b)

10^-12 F

c)

10^-15 F

10.

A non polar dielectric is placed in an electric field its induced dipole moment

a)

Acts along the direction of E

b)

Acts opposite to the direction of E

c)

Zero

11.

n capacitors each of capacitance C are connected in series the effective capacitance is

a)

n/C

b)

C/n

c)

nC

12.

The principle used in lightning conductor

a)

Corona discharge

b)

Electromagnetic induction

c)

Mutual induction

13.

For which of the following medium the value of relative permittivity is one

a)

Mica

b)

Glass

c)

Air

14.

When a dielectric slab is introduced between the plates of a charged parallel plate capacitor, its

a)

Potential increases

b)

Electric field decreases

c)

Capacitance decreases

15.

Effective capacitance of two capacitors having equal capacitance when connected in series is 12 pF. Find the capacitance of each capacitor

a)

6 pF

b)

3 pF

c)

24 pF