NCERT Physics Class 12 Electric Charges and Fields - Chapter 1 Quiz 1

1. What is the SI unit of electric charge?

Coulomb

Volt

Joule

Tesla

2. The force between two point charges is governed by Coulomb’s law. It is:

Directly proportional to the product of the charges

Inversely proportional to the square of the distance between charges

Both A and B

None of the above

3. Which of the following is true for a conductor in electrostatic equilibrium?

Electric field inside the conductor is zero

Electric field is non-zero inside the conductor

Charge is uniformly distributed inside the conductor

None of the above

4. What is the electric flux through a spherical surface that encloses an electric dipole?

Positive

Negative

Zero

Infinite

5. If the distance between two charges is doubled, the force between them becomes:

Four times

Half

One-fourth

Twice

6. The SI unit of electric field is:

Newton/Coulomb

Volt/meter

Tesla

Both A and B

7. An electric dipole consists of:

Two equal and opposite charges separated by a small distance

Two like charges separated by a small distance

One charge placed in an electric field

A single charge moving with constant velocity

8. What is the nature of the electric field inside a hollow spherical conductor?

Uniform

Radial

Zero

Infinite

9. What happens to the force between two charges if both charges are doubled while keeping the distance constant?

It becomes double

It becomes four times

It remains the same

It becomes half

10. What is the direction of the electric field due to a positive point charge?

Radially inward

Radially outward

Circular around the charge

Perpendicular to the charge

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