Physics MCQs with Answers
1. The SI unit of electric charge is:
- Volt
- Ampere
- Coulomb
- Ohm
Answer: C) Coulomb
2. Who discovered the electron?
- Ernest Rutherford
- J. J. Thomson
- Niels Bohr
- James Clerk Maxwell
Answer: B) J. J. Thomson
3. According to Coulomb’s Law, the electrostatic force between two charges is proportional to:
- Product of charges
- Sum of charges
- Square of charges
- Difference of charges
Answer: A) Product of charges
4. The force between two charges decreases when:
- Distance decreases
- Distance increases
- Charge increases
- Charge decreases
Answer: B) Distance increases
5. Electric field is defined as:
- Force acting on a body
- Charge per unit area
- Work done per unit charge
- Force per unit charge
Answer: D) Force per unit charge
6. The SI unit of electric field is:
- Newton per coulomb
- Coulomb per meter
- Volt per ampere
- Joule per coulomb
Answer: A) Newton per coulomb
7. Electric field lines originate from:
- Negative charges
- Both positive and negative charges
- Positive charges
- Neutral objects
Answer: C) Positive charges
8. The electric field inside a conductor in electrostatic equilibrium is:
- Infinite
- Zero
- Constant
- Very large
Answer: B) Zero
9. Which law states that the total electric flux through a closed surface is proportional to the charge enclosed?
- Faraday’s Law
- Ohm’s Law
- Gauss’s Law
- Kirchhoff’s Law
Answer: C) Gauss’s Law
10. Which principle states that the total force on a charge is the vector sum of individual forces?
- Principle of conservation of charge
- Coulomb principle
- Gauss principle
- Principle of superposition
Answer: D) Principle of superposition