GUJCET Class 12 Physics MCQ Test – Electric charges and Fields (Chapter 1) | Full Chapter Test

GUJCET Class 12 Physics

Chapter 1: Electric Charges and Fields – Full Chapter Test

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1. Two charges +q and –q separated by distance 2a form an electric dipole. The electric field at the midpoint is:

Zero Along dipole axis from +q to –q Along dipole axis from –q to +q Perpendicular to dipole axis

2. Coulomb’s law is valid when charges are:

At rest and point charges Moving with constant velocity Distributed uniformly Inside conductor

3. Electric field inside a uniformly charged thin spherical shell is:

Constant Zero Maximum Infinite

4. Electric flux through a closed surface depends upon:

Shape of surface Charge enclosed Area of surface Orientation of surface

5. Electric field due to an infinitely long charged wire varies with distance r as:

1/r² 1/r r constant

6. Torque on electric dipole in uniform electric field is maximum when angle between dipole moment and field is:

0° 45° 90° 180°

7. If distance between two charges is doubled, electrostatic force becomes:

Half One-fourth Double Four times

8. According to Gauss theorem, total electric flux through closed surface is:

qε₀ q/ε₀ ε₀/q zero always

9. Electric field lines never intersect because:

Field magnitude changes Field has unique direction at each point Charges repel each other Potential becomes zero

10. For an infinite plane sheet with surface charge density σ, electric field is:

σ/ε₀ σ/2ε₀ σ/4πε₀ zero

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