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capacitors

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

Which of the following is symbol of capacitor ?

a)
b)
c)
d)
2.

Capacitance is measured in___________

a)

Coulombs

b)

Farads

c)

Hz

d)

Volts

3.

The insulating layer of a capacitor is called the

a)

plate

b)

conductors

c)

dielectric

d)

terminals

4.

In the capacitor, the dielectric can be made out of all sorts of ---------- materials and the plates are made of a -------------- material.

a)

conductive, insulating

b)

conductive, conductive

c)

insulating, conductive

d)

insulating, insulating

5.

When power is supplied to a circuit that includes a capacitor - the capacitor ______________up.

a)

charges

b)

discharge

6.

The capacity of parallel plate condenser depends on

a)

The type of metal used

b)

The thickness of plates

c)

The potential applied across the plates

d)

The separation between the plates

7.

Can a metal be used as a medium for dielectric

a)

Depends on its shape

b)

Depends on dielectric

c)

YES

d)

NO

8.

When a slab of dielectric material is introduced between the parallel plates of a capacitor which remains connected to a battery, then charge on plates relative to earlier charge

a)

Is less

b)

Is same

c)

Is more

d)

May be less or more depending on the nature of the material introduced

9.

During charging a capacitor variation of potential V of the capacitor with time t is shown as

a)
b)
c)
d)
10.

What is the function of a capacitor?

a)

To capacitate

b)

To resist current

c)

To consume energy as heat

d)

To store energy as electric charge

11.

What formula does the above formula represent?

a)

Parallel capacitance

b)

Series resistance

c)

Parallel resistance

d)

Series capacitance

12.
If C is the capacitance in Farads, ϵ permittivity of the dielectric, A area of plate overlap in square meters and d distance between plates in meters, then:
a)
C = ϵd/A 
b)
C = A/ϵd
c)
C = ϵA/d
d)
C = d/ϵA
13.
The following are factors affecting capacitance, except.
a)
Dielectric in between the metal plates
b)
Area  of the metal plates
c)
Distance of separation of the metal plates
d)
Voltage across the metal plates
14.
Capacitor C1 and C2 are connected in parallel. The equivalent capacitance is given by: 
a)
C1 + C2
b)
1/(C1 + C2) 
c)
C1C2/(C1 + C2) 
d)
(C1 + C2)/C1C2
15.

If dielectric is inserted ,When the battery is connected the electric filed is

a)

increases

b)

constant

c)

decreases

d)

zero

16.

If dielectric is inserted, When the battery is connected the capacitance is

a)

decreases

b)

increases

c)

constant

d)

zero

17.

Capacitors is used to ---------- the efficiency of power transmission

a)

increase

b)

decrease

18.

Capacitance is

a)

defined as the amount of charge stored on a conductor per unit volt

b)

defined as the amount of current flowing in a conductor per unit volt

c)

how full the capacitor is

d)

equal to voltage times charge

19.
In the RC circuit, the time constant (τ) for the circuit is:
a)
τ = R × C
b)
τ = R / C
c)
τ = C × R
d)
τ = R2 × C
20.

A capacitor consists of

a)

Two insulators separated by a conductor

b)

Two conductors separated by an insulator

c)

Two insulators only

d)

Two conductors only

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