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Class 12 Physics - Chapter 8: Electromagnetic Waves MCQ Questions

9 Questions 18 Minutes
Answered: 0 / 9Unanswered: 9

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Question 1

What physical quantity is the same for X-rays of wavelength 10-10 m, red light of wavelength 680 nm and radio waves of wavelength 500 m?

Question 2

A radiation of energy ‘E’ falls normally on a perfectly reflecting surface. The momentum transferred to the surface is (c = Velocity of light)

Question 3

The source of electromagnetic waves can be a charge

Question 4

In an electromagnetic wave in free space, the root mean square value of the electric field is Erms = 6 V m-1. The peak value of the magnetic field is:

Question 5

(D) Radio wave

Question 6

this point.

Question 7

If (vec {E}) and (vec {B}) represent electric and magnetic field vectors of the electromagnetic wave, the direction of propagation of electromagnetic wave is along

Question 8

A charged particle oscillates about its mean equilibrium position with a frequency of 109 Hz. The electromagnetic waves produced will not

Question 9

The ratio of contributions made by the electric field and magnetic field components to the intensity of an EM wave is

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