12TH Physics - Electrostatics MCQS QUIZ

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Electrostatics MCQ Test

1. _______ and Coulomb's law form the fundamental principles of electrostatics.

Newton's law of gravitation
Superposition principle
Ohm's law
Kepler's law

2. When amber is rubbed with fur, it attracts bits of paper. This was discovered by ______.

Amber
Thales
Gilbert
Benjamin Franklin

3. The force between like charges is ______.

Attraction
Repulsion
No force
None

4. Relative permittivity (ε_r) is also known as ______.

Dielectric strength
Dielectric constant
Polarisability
Susceptibility

5. The energy stored per unit volume of space is called ______.

Linear density
Surface density
Volume density
Energy density

6. When a 4 V emf is applied across a 1 F capacitor, the energy stored is ______.

2 J
4 J
6 J
8 J

7. The value of k in Coulomb's law depends upon ______.

Magnitude of charges
Distance between charges
Both (a) and (b)
Medium between two charges

8. The negative gradient of potential is ______.

Torque
Electric current
Electric field intensity
Electric force

9. Which one of the following is a vector quantity?

Electric charge
Electric field
Electric flux
Electric potential

10. The electric field created by a ______ is basically a non-uniform electric field.

Test charge
Positive charge
Negative charge
Point charge

11. Eight mercury droplets each of radius 1 mm and charge 0.066 pC merge into one droplet. The potential of the new droplet is ______.

2.4 V
1.2 V
3.6 V
4.8 V

12. A force of 40 N acts between two charges in air. If the medium is replaced by glass (ε_r=8), the force becomes ______.

20 N
10 N
5 N
Unchanged

13. The concept of "Field" was introduced by ______.

Faraday
Gauss
Maxwell
None

14. The force experienced by a unit positive charge is called ______.

Electric potential
Electric flux
Electric field
Static electricity

15. In a hydrogen atom, the electron revolves around the proton at a radius of 0.53 Å. The potential produced by the electron at the nucleus is ______.

6.8 V
13.6 V
54.4 V
27.2 V