Maxwell’s Equations Conceptual MCQs
Maxwell’s Equations Conceptual MCQs
Class: 12 | Subject: Physics
Section: 5 – Electromagnetic Waves
Topic: Maxwell’s Equations Conceptual MCQs
Based on: CBSE Board Examination Pattern
Section: 5 – Electromagnetic Waves
Topic: Maxwell’s Equations Conceptual MCQs
Based on: CBSE Board Examination Pattern
Instructions: These Multiple Choice Questions (MCQs) are designed strictly as per the NCERT syllabus, making them ideal for CBSE Class 12 Board Examination preparation.
1. Maxwell introduced displacement current to modify:
Answer: C
Ampere’s law failed for time-varying fields. Maxwell added displacement current to make it universally valid.
Ampere’s law failed for time-varying fields. Maxwell added displacement current to make it universally valid.
2. Displacement current exists due to:
Answer: C
A time-varying electric field produces displacement current even in vacuum.
A time-varying electric field produces displacement current even in vacuum.
3. Gauss’s law relates electric flux with:
Answer: B
Flux through a closed surface equals charge enclosed / ε₀.
Flux through a closed surface equals charge enclosed / ε₀.
4. Gauss’s law for magnetism states:
Answer: B
Net magnetic flux through a closed surface is zero → no monopoles.
Net magnetic flux through a closed surface is zero → no monopoles.
5. Faraday’s law explains:
Answer: C
Changing magnetic flux induces EMF.
Changing magnetic flux induces EMF.
6. Maxwell’s equations predict:
Answer: C
Coupled changing E and B fields propagate as EM waves.
Coupled changing E and B fields propagate as EM waves.
7. Speed of EM waves from Maxwell theory depends on:
Answer: B
c = 1/√(μ₀ε₀).
c = 1/√(μ₀ε₀).
8. Which equation shows non-existence of magnetic monopoles?
Answer: B
Net magnetic flux = 0.
Net magnetic flux = 0.
9. Changing electric field produces:
Answer: B
Basis of displacement current.
Basis of displacement current.
10. Unit of displacement current is:
Answer: B
It behaves like conduction current.
It behaves like conduction current.
11. Curl of electric field is related to:
Answer: B
From Faraday’s law.
From Faraday’s law.
12. Divergence of magnetic field is:
Answer: A
No magnetic charges exist.
No magnetic charges exist.
13. Maxwell unified:
Answer: B
Foundation of electromagnetism.
Foundation of electromagnetism.
14. Light is an example of:
Answer: B
Predicted by Maxwell.
Predicted by Maxwell.
15. EM wave propagation requires:
Answer: C
Self-sustaining fields.
Self-sustaining fields.
16. Direction of EM wave is along:
Answer: C
Poynting vector direction.
Poynting vector direction.
17. Maxwell equations are:
Answer: C
Four fundamental equations.
Four fundamental equations.
18. Displacement current is significant in:
Answer: B
Fields vary with time.
Fields vary with time.
19. EM waves are solutions of:
Answer: B
Wave equations derived from them.
Wave equations derived from them.
20. Maxwell’s contribution led to:
Answer: B
Light identified as EM radiation.
Light identified as EM radiation.