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Electric field

Total questions: 25

Worksheet time: 13mins

Name
Class
Date
1.

The transformation of closed path integral to the surface integral is

a)

Gauss theorem

b)

Stokes theorem

c)

Faraday theorem

2.

Scalar field is

a)

electric filed

b)

magnetic field

c)

electric potential

3.

Charge density can be obtained from electric field by calculating

a)

gradient of E

b)

Curl of E

c)

Divergence of E

4.

The electric field inside a spherical shell of uniform surface charge density is

a)

Constant, less than zero

b)

Directly proportional to the distance from the centre

c)

zero

d)

None of the above

5.

An charge is accelerated in a electric field, the accelerations will be

a)

unity

b)

directly proportional to the mass

c)

inversely proportional to the mass

d)

ratio of the masses of electron and proton

6.

A charge particle is free to move in an electric field. It will travel

a)

Always along a line of force

b)

Along a line of force, if its initial velocity is zero

c)

Along a line of force, if it has some initial velocity in the direction of an acute angle with the line of force

d)

None of the above

7.

The unit of electric field is not equivalent to

a)

N/C

b)

J/C

c)

V/m

d)

J/Coulomb.meter

8.

There is a solid sphere of radius ‘R’ having uniformly distributed charge. What is the relation between electric field ‘E’ (inside the sphere) and radius of sphere ‘R’ is

a)

 E∝R−2E\propto R^{-2}  

b)

 E∝R−1E\propto R^{-1}  

c)

 E∝R2E\propto R^2  

d)

 E∝1R3E\propto\frac{1}{R^3}  

9.
Which of the following is a true statement about the electric field between the two plates?
a)
The field is attractive between the plates and uniform in strength
b)
The field is repulsive between the plates and uniform in strength
c)
The field is attractive between the plates and strongest near the positive
d)
The field is repulsive between the plates and strongest near the positive
10.

What does the Law of Conservation of Charge state?

a)

like charges repel and opposites attract

b)

positive charge fields point away from a charge; negative points toward

c)

charges cannot be created nor destroyed, only transferred

11.
Which of the following statements is false about electric field lines
a)
electric field lines cannot cross
b)
electric field lines point away from positive charge
c)
electric field lines are always straight lines
d)
electric field lines show how a proton would move in an electric field
12.

Electric potential ____________ as distance increases.

a)

Increases

b)

Decreases

c)

Remains Constant

d)

Is 0

13.

The magnitude of electric potential is ______ at an infinite distance.

a)

0

b)

negative infinity

c)

positive infinity

d)

200

14.

Inside a hollow charged spherical conductor, the potential

a)

Varies directly as the distance from the centre

b)

Varies inversely as the distance from the centre

c)

Varies inversely as the square of the distance from the centre

d)

Is constant

15.

If a unit positive charge is taken from one point to another over an equipotential surface, then

a)

Work is done on the charge

b)

Work is done by the charge

c)

Work done is constant

d)

No work is done

16.

Angle between equipotential surface and lines of force is

a)

0

b)

180

c)

90

d)

45

17.

Two charge +Q and -Q are situated at a certain distance. At the point exactly midway between them

a)

Electric field and potential both are zero

b)

Electric field is zero but potential is not zero

c)

Electric field is not zero but potential is zero

d)

Neither electric field nor potential is zero

18.

Which point has the largest magnitude of electric field?

a)

A

b)

C

c)

E

d)

all the same

19.

What is the S. I. unit of electric flux?

a)

NCm2\frac{N}{C}m^2

b)

Nm2C2\frac{N}{m^2}C^2

c)

N m2N\ m^2

d)

Nm2C\frac{N}{m^2}C^{ }

20.

What will be the value of electric field at the centre of the electric dipole : -

a)

Zero

b)

Equal to the electric field due to one charge at centre

c)

Twice the electric field due to one charge at centre

d)

half the value of electric field due to one charge at centre

21.

Consider electric field due to a charge is E. If the charge and distance is doubled then the electric field is

a)

E

b)

E/2

c)

E/4

d)

2E

22.

Which of the following best describes the electric potential of a charged particle

a)

the total force exerted on or by the charged particle

b)

the force per unit charge

c)

the potential energy of the particle relative to infinity

d)

the potential energy per unit charge

23.

Gauss’ law relates the electric field at points on a Gaussian surface with

a)

charges near the surface

b)

net charge enclosed by the surface

c)

electric field flux entering the volume enclosed by the surface

d)

electric field flux leaving the volume enclosed by the surface

24.

A region around a charged body in which another charge experiences an electric force is called

a)

electric potential

b)

potential energy

c)

electric field

d)

electric flux

25.

The work done in moving a charge against the electric field is stored as

a)

electric potential energy

b)

electric flux

c)

electrostatic force

d)

electric field

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