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Chapter (9) Capacitance

Total questions: 20

Worksheet time: 7mins

Name
Class
Date
1.

For a vacuum ĸ=1, for other media _____.

a)

ĸ=0

b)

ĸ<1

c)

ĸ>1

2.

If the distance between two metal plates is increase its capacitance is_____.

a)

decrease

b)

increase

c)

constant

3.

A capacitor stores electrical energy in the form of an_____field.

a)

magnetic

b)

electric

c)

gravitational

4.

The SI unit for surface charge density is _____.

a)

Cm-2

b)

Vm-2

c)

As

5.

1CV-1 is expressed as one ____.

a)

volt

b)

ohm

c)

farad

6.

The unit farad is named in honor of scientist _____.

a)

Coulomb

b)

Michael Faraday

c)

Joule

7.

The magnitude of the electric field in the region between two parallel oppositely-charged metal plates is ____.

a)

zero

b)

non uniform

c)

uniform

8.

When the distance between the two parallel plates of a capacitor of a capacitance 10µF is doubled the capacitance will become______.

a)

5µF

b)

20µF

c)

25µF

9.

A ____ capacitor is a simplest capacitor.

a)

cylinder

b)

parallel-plate

c)

spherical

10.

A capacitor consists of two ____ separated by a small distance.

a)

conductors

b)

insulators

c)

semiconductors

11.

If one conductor of a capacitor ha a charge of +0.002C, then the other has _____.

a)

+0.002C

b)

-0.002C

c)

±0.002C

12.

In series connection, all capacitors have the same_____.

a)

potential

b)

current

c)

charges

13.

The insulating materials are also called_____.

a)

dielectrics

b)

conductors

c)

inductors

14.

The greatest capacitance can be obtained by connecting several capacitors in_____.

a)

series

b)

parallel

c)

none of these

15.

The amount of charge given to a conductor to change its potential by one unit is called______.

a)

electric capacity

b)

thermal capacity

c)

charge density

16.

Two 5µF capacitors are connected in parallel. The equivalent capacitance is______.

a)

25µF

b)

10µF

c)

2.5µF

17.

The ratio of the permittivity of an insulator to that of vacuum is called_____ of that insulator.

a)

dielectric constant

b)

electric capacity

c)

relative density

18.

The energy stored in a capacitor is directly proportional to ____ .

a)

C2

b)

Q2

c)

V2

19.

A dielectric material is a/an _____.

a)

insulator

b)

conductor

c)

semiconductor

20.

To have the same charge on several capacitors in a battery circuit they should be connected in ____.

a)

series

b)

parallel

c)

none of these