Free Printable Electrostatics

Free Printable Worksheets

Worksheets

Electrostatics

Total questions: 15

Worksheet time: 11mins

Name

Class

Date

1.

In a charged capacitor, the energy resides

a)

The positive charges

b)

Both the positive and negative charges

c)

The field between the plates

d)

Around the edge of the capacitor plates

2.

The energy of a charged capacitor is given by the expression (q= charge on the conductor and C = its capacity)

a)

$\frac{q^2}{2C}$

b)

$\frac{q^2}{C}$

c)

$\frac{q^{ }}{2C^2}$

d)

2qC

3.

The capacity of a parallel plate condenser is C . Its capacity when the separation between the plates is halved will be

a)

4C

b)

2C

c)

C/2

d)

C/4

4.

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

5.

Two condensers of capacity 0.3 $\mu$ F and 0.6 F respectively are connected in series. The combination is connected across a potential of 6 Volts. The ratio of energies stored by the condensers will be

a)

1/2

b)

2

c)

1/4

d)

4

6.

Change Q on a capacitor varies with voltage V . The area of triangle OAB represents

a)

Capacitance

b)

Capacitive reactance

c)

Magnetic field between the plates

d)

Energy stored in the capacitor

7.

A capacitor is charged to 200 volt it has 0.1 coulomb charge. When it is discharged, energy will be

a)

1 J

b)

4 J

c)

20 J

d)

10 J

8.

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

a)

b)

c)

d)

9.

For a point charge, the graph between electric field versus distance is given by :

a)

b)

c)

d)

10.

Consider the electric field lines shown in the diagram below. From the diagram, it is apparent that object A is ____ and object B is ____.

a)

+,+

b)

+,-

c)

-,+

d)

-,-

11.

When a dielectric material is inserted between the plates of a capacitor, what effect does it have on the capacitance?

a)

Increases

b)

Decreases

c)

Remains the same

d)

First increases then decreases

12.

When a dielectric material is inserted between the plates of a capacitor, what effect does it have on the electric field between the plates?

a)

Increases

b)

Decreases

c)

Remains the same

d)

First increases then decreases

13.

Electrostatic force F exists between two point charges. If the both charges are doubled, the force between the charges will be

a)

F

b)

4F

c)

2F

d)

F/4

14.

The electric field inside a charged conducting sphere of radius R is

a)

$\frac{1}{4\pi\epsilon_0}\ \frac{q}{R^2}$

b)

$\frac{1}{4\pi\epsilon_0}\ \frac{q}{r^2}$

c)

$\frac{1}{4\pi\epsilon_0}\ \frac{q}{R}$

d)

0

15.

The SI unit of charge is

a)

the ampere

b)

the newton

c)

the coulomb

d)

the joule

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