Electromagnetic Waves — Practice Quiz
ICSE · Class 12 · Physics
Try a 4-question quiz on Electromagnetic Waves for ICSE Class 12 Physics: tap an answer to check it and see why. 68 questions in the full chapter test.
Interactive on Super Tutor
Studying Electromagnetic Waves? Get the full interactive chapter.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for practice quiz and more.
Free trial, no card needed.
Learn better with visuals Super Tutor pairs illustrations like this with notes and quizzes for Electromagnetic Waves.
Quick Quiz: Electromagnetic Waves
0/4Tap an answer to check it instantly. No sign-up needed for these 4.
A capacitor has plate area 0.020 m² and plate separation 2.0 mm. If the electric field between the plates changes at the rate of 3.0 × 10^5 V m^-1 s^-1, what is the displacement current?
A charging capacitor carries a conduction current of 0.40 A in its connecting wires. What is the displacement current between its plates during charging?
An electromagnetic wave in vacuum has frequency 6.0 × 10^8 Hz and electric field amplitude 24 N/C. What are its wavelength and magnetic field amplitude?
A radio signal has frequency 9.0 × 10^6 Hz. What is its wavelength?
Sample Questions
A wave in a medium travels at 2.0 × 10^8 m/s. If the medium has relative permeability 1.0, what is its relative permittivity?
Show answer
2.25
Use v = c / sqrt(μr εr). Rearranging gives εr = c²/(v² μr). Substituting c = 3.0 × 10^8 m/s, v = 2.0 × 10^8 m/s, μr = 1.0, we get εr = (3.0²)/(2.0²) = 9/4 = 2.25.
An electromagnetic wave has electric field amplitude 120 N/C. What is its magnetic field amplitude in vacuum?
Show answer
4.0 × 10^-7 T
Use E/B = c, so B0 = E0/c = 120 / (3.0 × 10^8) = 4.0 × 10^-7 T.
A plane EM wave in vacuum has electric field amplitude 60 N/C. What is its intensity?
Show answer
4.77 × 10^-2 W m^-2
Use ⟨I⟩ = 1/2 ε0 E0² c. Substituting ε0 = 8.85 × 10^-12, E0 = 60 N/C, c = 3.0 × 10^8 m/s gives ⟨I⟩ = 0.5 × 8.85 × 10^-12 × 3600 × 3.0 × 10^8 = 4.77 × 10^-2 W m^-2.
A capacitor is fully charged. Which statement about current is correct?
Show answer
Ic = 0 and Id = 0
When the capacitor is fully charged, no current flows in the wires and the electric field between the plates is no longer changing. Therefore both conduction current and displacement current become zero.
+64 more questions on Electromagnetic Waves (ICSE Class 12 Physics)
Practise AllFrequently Asked Questions
What are the important topics in Electromagnetic Waves for ICSE Class 12 Physics?
How many practice questions are there for Electromagnetic Waves?
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
More resources for Electromagnetic Waves
Important Questions
Exam-style questions with answers
Revision Notes
Key points for last-minute revision
Formula Sheet
The chapter's formulas in one place
Chapter Summary
Understand the chapter at a glance
Concept Maps
See how topics connect
Study Plan
Step-by-step plan for this chapter
Flashcards
Quick-fire cards for active recall
Syllabus
What topics to cover
For serious students
Get the full Electromagnetic Waves chapter — start free.
Quizzes, flashcards, an AI doubt solver and a study plan for ICSE Class 12 Physics. Free to start, no card needed.