Electromagnetic Waves: Class 12 Physics (Bihar Board) important questions and practice
Electromagnetic Waves is chapter 8 of 14 in Bihar Board Class 12 Physics. Below are the topics the paper draws from, the question types that come up again and again, and a free practice test on this chapter alone.
Topics in this chapter
- Displacement current and Maxwell's modification of Ampere's law
- Nature and properties of electromagnetic waves (transverse, speed c = 1/root(mu0 epsilon0))
- Relation E0/B0 = c and energy of EM waves
- Electromagnetic spectrum: radio, microwave, infrared, visible, UV, X-rays, gamma rays
- Production and uses of each part of the spectrum
What examiners usually ask
- What is displacement current? Why was it necessary to modify Ampere's circuital law?
- Name the electromagnetic radiation used for (a) water purification (b) remote sensing (c) treatment of cancer and give its frequency range
- A plane EM wave has E0 = 120 N/C; find B0 and the direction of propagation if E is along y and B along z
Exam tip
This is a short chapter with reliable 1-2 mark questions: prepare the spectrum table with wavelength order, source and one use for each band, and define displacement current as epsilon0 d(phi_E)/dt with the capacitor example.
Electromagnetic Waves on other boards and exams
Frequently asked questions
What are the important questions from Electromagnetic Waves for Bihar Board Class 12?
The question types listed above repeat most often in Bihar Board Class 12 Physics papers for this chapter. Practise them with the chapter test and then attempt them inside a full previous-year paper under time.
Is Electromagnetic Waves in the Bihar Board Class 12 Physics syllabus?
Yes. Electromagnetic Waves is part of the current Bihar Board Class 12 Physics syllabus, as listed on this site from the prescribed textbook.
Can I practise Electromagnetic Waves MCQs in Hindi?
Yes. The chapter test and explanations are available in Hindi and English, with an AI doubt solver for any question.