Free Printable Electric Charges and Fields

1.

1. Two charges 3x $10^{-5}$ C and 5x $10^4$ C are placed at a distance 10 cm from each other. Find the value of electrostatic force acting between them.

a)

$13.5\times10^{11}$ N

b)

$40\ \times\ 10^{11^{ }}$

c)

$180\times10^9$

d)

$13.5\times10^{10}$

2.

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

a)

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

b)

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

c)

$N\ m^2$

d)

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

3.

What is the value of minimum force acting between two charges placed at 1 m apart from each other

a)

$K\ e$

b)

$K\ e^2$

c)

$\frac{Ke}{4}$

d)

$\frac{Ke^2}{9}$

4.

A glass rod acquires charge by rubbing it with silk cloth. The charge on glass rod is due to :

a)

Conduction

b)

Induction

c)

Radiation

d)

Friction

5.

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

a)

b)

c)

d)

6.

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

7.

Electric field lines contracts lengthwise, It shows

a)

repulsion between same charges

b)

Attraction between apposite charges

c)

No relation between force & contraction.

d)

Electric field lines does not moves on straight path.

8.

On charging a neutral Balloon its size -

a)

Increases

b)

Decreases

c)

Remains same

d)

No relation between charge & size

9.

Charge Q is kept in a sphere of 5 cm first than it is kept in a cube of side 5 cm. the outgoing flux will be-

a)

Electric Charges and Fields

Total questions: 10

Worksheet time: 8mins

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