Chapter Exam

Chapter 11: Electromagnetic Waves — Online MCQ Test

Q: Which current was introduced by Maxwell to modify Ampere's circuital law?

Answer: B. Displacement current — Maxwell introduced displacement current to account for changing electric fields and to make Ampere's law consistent.

Q: Electromagnetic waves are produced by:

Answer: B. An accelerating charge — Accelerating charges produce time-varying electric and magnetic fields, which propagate as electromagnetic waves.

Q: A time-varying electric field between the plates of a capacitor gives rise to:

Answer: B. Displacement current — A changing electric field produces displacement current, which exists even in the region where no actual charge carriers move.

Q: In Maxwell's correction, displacement current is introduced mainly to preserve the law of:

Answer: B. Conservation of charge — Displacement current ensures continuity of current and makes Ampere's law consistent with conservation of charge.

PHYSICS · CLASS 12 INTERMEDIATE 2 YEAR · Telangana State Board

Practice Chapter 11: Electromagnetic Waves with a free chapter-wise online MCQ test for Telangana State Board CLASS 12 INTERMEDIATE 2 YEAR PHYSICS. This chapter covers: Focusing on electromagnetic theory this chapter covers displacement current electromagnetic wave spectrum production characteristics and applications across radio microwave infrare.... AI-generated questions from basic to board-exam level, with instant results and explanations.

Questions

20m

Time Limit

Attempts Left

10 random questions from this chapter (mixed difficulty)
Questions you've seen before won't repeat until the pool resets
You have 20 minutes — exam auto-submits when time is up
Maximum 3 attempts per chapter
Results and explanations shown immediately after submission

New here? Register free — includes 3 free chapter exams.

Chapter 11: Electromagnetic Waves — Important Questions & Answers (FAQ)

Frequently asked questions from Telangana State Board CLASS 12 INTERMEDIATE 2 YEAR PHYSICS — Chapter 11: Electromagnetic Waves, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which current was introduced by Maxwell to modify Ampere's circuital law?

A. Conduction current
B. Displacement current ✓
C. Hall current
D. Drift current

Answer: B. Displacement current
Maxwell introduced displacement current to account for changing electric fields and to make Ampere's law consistent.

Electromagnetic waves are produced by:

A. A stationary electric charge
B. An accelerating charge ✓
C. A neutral body at rest
D. A magnetic monopole

Answer: B. An accelerating charge
Accelerating charges produce time-varying electric and magnetic fields, which propagate as electromagnetic waves.

A time-varying electric field between the plates of a capacitor gives rise to:

A. Only conduction current
B. Displacement current ✓
C. No current
D. Hall current

Answer: B. Displacement current
A changing electric field produces displacement current, which exists even in the region where no actual charge carriers move.

In Maxwell's correction, displacement current is introduced mainly to preserve the law of:

A. Conservation of momentum
B. Conservation of charge ✓
C. Conservation of energy
D. Newton's third law

Answer: B. Conservation of charge
Displacement current ensures continuity of current and makes Ampere's law consistent with conservation of charge.

Which statement about electromagnetic waves is correct?

A. Their electric field can exist without a magnetic field
B. Their magnetic field is always zero in vacuum
C. They can propagate in vacuum even without charges and currents present locally ✓
D. They are produced only by static charges

Answer: C. They can propagate in vacuum even without charges and currents present locally
Electromagnetic waves can travel through vacuum without requiring a material medium, and their fields sustain each other during propagation.