Class 12 Physics - Chapter 8: Electromagnetic Waves MCQ Questions

9 Questions 18 Minutes

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Your Class 12 Physics Study Path

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?

A None of these.

B Speed

C Frequency

D Wavelength

Question 2

A radiation of energy â€˜Eâ€™ falls normally on a perfectly reflecting surface. The momentum transferred to the surface is (c = Velocity of light)

A E/c

B E/cÂ²

C 2E/cÂ²

D 2E/c

Question 3

The source of electromagnetic waves can be a charge

A none of these.

B at rest.

C moving in a circular orbit.

D moving with a constant velocity.

Question 4

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

A 1.41 Ã— 10^-8T

B 4.23 Ã— 10^-8 T

C 0.70 Ã— 10^-8 T

D 2.83 Ã— 10^-8 T

Question 5

(D) Radio wave

A D, B, A, C

B B, A, D, C

C C, A, B, D

D A, B, C, D

Question 6

this point.

A 0.21 Ã— 10^-8T

B 1.9 Ã— 10^-8 T

C 1.2 Ã— 10^-8 T

D 2.1 Ã— 10^-8 T

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

A (vec {E}) Ã— (vec {B})

B (vec {B}) Ã— (vec {E})

C (vec {B})

D (vec {E})

Question 8

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

A fall in the region of radio waves.

B have a wavelength of 0.3 m.

C have a frequency of 2 Ã— 10⁹ Hz.

D have a frequency of 10⁹ Hz.

Question 9

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

A âˆšc : 1

B 1 : 1

C cÂ² : 1

D c : 1

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Class 12 Physics - Chapter 8: Electromagnetic Waves MCQ Questions

Your Class 12 Physics Study Path

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?

A radiation of energy â€˜Eâ€™ falls normally on a perfectly reflecting surface. The momentum transferred to the surface is (c = Velocity of light)

The source of electromagnetic waves can be a charge

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

(D) Radio wave

this point.

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

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

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

Practice Complete!

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Class 12 Physics - Chapter 8: Electromagnetic Waves MCQ Questions

Your Class 12 Physics Study Path

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?

A radiation of energy â€˜Eâ€™ falls normally on a perfectly reflecting surface. The momentum transferred to the surface is (c = Velocity of light)

The source of electromagnetic waves can be a charge

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:

(D) Radio wave

this point.

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

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

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

Practice Complete!

Related Student Tools

Grade Calculator

Marks Percentage Calculator

Percentage Calculator

Students Also Read

Discover More on SaralStudy

Latest Blogs

Popular Blogs

Quick & Popular Links

Quick Links

Popular Study Links

What Students Are Viewing

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?

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

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