Chapter 8: Electromagnetic Waves MCQs | physics Class 12 CBSE

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Chapter 8: Electromagnetic Waves MCQs | physics Class 12 CBSE | ByteNotes.in

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Question 1

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Maxwell introduced the concept of displacement current to remove the inconsistency in:

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Question 2

Objective

Displacement current between the plates of a capacitor is given by:

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Question 3

Objective

Inside a capacitor that is being charged, which of the following is correct?

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Question 4

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The total current in the Ampere-Maxwell law is the sum of conduction current (iₓ) and displacement current (iₐ). In a region of free space far from any conductor where an EM wave is propagating, what is the situation?

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Question 5

Objective

Which of the following can produce electromagnetic waves?

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Question 6

Objective

The frequency of an electromagnetic wave produced by an oscillating charge equals:

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Question 7

Objective

Hertz produced electromagnetic waves experimentally for the first time in the year:

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Question 8

Objective

In a plane electromagnetic wave propagating along the z-direction, the electric field oscillates along the x-axis and the magnetic field oscillates along the y-axis. The angle between E and B is:

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Question 9

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The relation between the amplitudes of electric and magnetic fields in an electromagnetic wave in free space is:

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Question 10

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The speed of electromagnetic waves in vacuum is:

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Question 11

Objective

In a material medium with permittivity ε and permeability µ, the speed of electromagnetic waves is:

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Question 12

Objective

The wave number k of an electromagnetic wave is related to its wavelength λ by:

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Question 13

Objective

The dispersion relation for electromagnetic waves in vacuum is:

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Question 14

Objective

An electromagnetic wave of frequency 25 MHz travels in free space. The magnitude of the magnetic field B at a point where E = 6.3 V/m is approximately:

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Question 15

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Radio waves are generally in the frequency range:

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Question 16

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Microwaves are produced by:

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Question 17

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Infrared waves are sometimes referred to as heat waves because:

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Question 18

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The wavelength range of visible light is approximately:

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Question 19

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Ultraviolet radiation is absorbed by:

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Question 20

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X-rays are generated by:

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Chapter 8: Electromagnetic Waves | MCQs

Maxwell introduced the concept of displacement current to remove the inconsistency in:

Displacement current between the plates of a capacitor is given by:

Inside a capacitor that is being charged, which of the following is correct?

The total current in the Ampere-Maxwell law is the sum of conduction current (iₓ) and displacement current (iₐ). In a region of free space far from any conductor where an EM wave is propagating, what is the situation?

Which of the following can produce electromagnetic waves?

The frequency of an electromagnetic wave produced by an oscillating charge equals:

Hertz produced electromagnetic waves experimentally for the first time in the year:

In a plane electromagnetic wave propagating along the z-direction, the electric field oscillates along the x-axis and the magnetic field oscillates along the y-axis. The angle between E and B is:

The relation between the amplitudes of electric and magnetic fields in an electromagnetic wave in free space is:

The speed of electromagnetic waves in vacuum is:

In a material medium with permittivity ε and permeability µ, the speed of electromagnetic waves is:

The wave number k of an electromagnetic wave is related to its wavelength λ by:

The dispersion relation for electromagnetic waves in vacuum is:

An electromagnetic wave of frequency 25 MHz travels in free space. The magnitude of the magnetic field B at a point where E = 6.3 V/m is approximately:

Radio waves are generally in the frequency range:

Microwaves are produced by:

Infrared waves are sometimes referred to as heat waves because:

The wavelength range of visible light is approximately:

Ultraviolet radiation is absorbed by:

X-rays are generated by:

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