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CUET Physics Questions Electromagnetic Waves AMBIPi

Hi CUET aspirants, Welcome to Amans Maths Blogs (AMBIPi). In this post, you will get CUET Physics Questions Electromagnetic Waves AMBIPi. This CUET Physics Mock Test is of the Physics chapter Electromagnetic Waves. Before solving these CUET Physics questions, you must read CUET Physics Notes, which helps you to revise and then you must need to solve CUET Previous Years Questions Papers.

CUET Physics Mock Test

CUET Physics Question No: 1

One requires 11 ev of energy to dissociate a carbon monoxide molecular into carbon and oxygen atoms. The minimum frequency of the appropriate electromagnetic radiation to achieve the dissociation lies in

Option A : Visible region

Option B : Infrared region

Option C : Ultraviolet region

Option D : Microwave region

Option C: Ultraviolet region

As E = hv

⇒ v =  E/h = 11/ 4.14 x 10-15 = 2.7 x 1015 Hz.

Frequency range of UV = 1014 Hz to 1017 Hz

CUET Exam Physics Question No: 2

Electromagnetic waves are produced by

Option A : accelerated charged particle

Option B : charge at rest

Option C : charge in uniform motion

Option D : none of the above

Option A: accelerated charged particle

Electromagnetic waves are produced by accelerated charged particle.

CUET UG Physics Question No: 3

The ratio of amplitude of magnetic field to the amplitude of electric field for an electromagnetic wave propagating field for an electromagnetic wave propagating in vacuum is equal to

Option A : the speed of light in vacuum

Option B : reciprocal of speed of light in vacuum

Option C : the ratio of magnetic permeability to the electric susceptibility of vacuum

Option D : unity

Option B: reciprocal of speed of light in vacuum

The ratio of amplitude of magnetic field to the amplitude of electric field for an electromagnetic wave propagating in vacuum is equal to the reciprocal of speed of light in vacuum.

CUET Domain Subject Physics Question No: 4

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

Option A : c : 1

Option B : c2 : 1

Option C : 1 : 1

Option D : √c : 1

Option C: 1 : 1

Intensity is

CUET BSc Physics Question No: 5

Fundamental particle in an electromagnetic wave is

Option A :  photon

Option B : electron

Option C : phonon

Option D : proton

Option C: phonon

Fundamental particle in an electromagnetic wave is photon.

CUET Entrance Exam Physics Question No: 6

x-rays of λ = 1 Å have frequency

Option A :  3 × 108 Hz

Option B : 3 × 1018 Hz

Option C : 3 × 1010 Hz

Option D : 3 × 1015 Hz

Option B: 3 × 1018 Hz

v = c/λ= 3 x 10 / 10-10 = 3 x 1018 Hz

CUET Exam Question No: 7

Earth’s atmosphere is richest in

Option A : UV-rays

Option B : IR-rays

Option C : X-rays

Option D : microwaves

Option B: IR-rays

Earth’s atmosphere is richest in Infra-red waves.

CUET Physics Practice Questions No: 8

According to Maxwell’s hypothesis, a changing electric field gives rise to

Option A : an emf

Option B : electric current

Option C : magnetic field

Option C: magnetic field

According to Maxwell’s hypothesis, a changing electric field gives rise to magnetic field.

CUET Physics Sample Paper Question No: 9

The velocity of electromagnetic waves in free space is 3 × 108 m/s. The frequency of a radiowaves of wave-length 150 m is

Option A : 45 MHz

Option B : 2 MHz

Option C : 20 KHz

Option D : 2 KHz

Option B: 2 MHz

v = c/ λ = 3x 108/ 150 = 300 x 106/ 150 = 2MHz

CUET Physics Mock Test Question No: 10

In general, the wavelength of microwaves is

Option A : more than that of radio waves

Option B : less than that of UV waves

Option C : more than that of IR waves

Option D : less than that of IR waves

Option C: more than that of IR waves

In general, the wavelength of microwaves is more than that of IR waves.

CUET Physics Question No: 11

Electromagnetic waves are transverse in nature is evident by

Option A : polarisation

Option B : interference

Option C :  reflection

Option D : diffraction

Option A: polarisation

Electromagnetic waves are transverse in nature is evident by polarisation

CUET Exam Physics Question No: 12

Option A : spectrometer

Option B : Pyrometer

Option C : Nanometer

Option D : Photometer

Option B: Pyrometer

Infrared radiations are detected by pyrometer.

CUET UG Physics Question No: 13

What is the cause of green house effect?

Option A :  Infrared rays

Option B : Ultraviolet rays

Option C : X-rays

Option A: Infrared rays

Infrared is the cause of greenhouse effect

CUET Domain Subject Physics Question No: 14

Which of the following radiations has the least wavelength?

Option A : γ-rays

Option B : β-rays

Option C : α-rays

Option D : X- rays

Option A: γ-rays

γ-rays has the least wavelength.

CUET BSc Physics Question No: 15

Which of the following is a natural source of -rays?

Radon gas is a natural source of γ-rays

CUET Entrance Exam Physics Question No: 16

An electromagnetic wave of frequency 3MHz passes from vacuum into a dielectric medium with permittivity ∈r = 4, then

Option A : The wavelength of frequency both remains unchanged

Option B : The wavelength is doubled and the frequency remains unchanged

Option C : The wavelength is doubled and the frequency becomes half

Option D : The wavelength is halved and the frequency remains unchanged.

Option D: The wavelength is halved and the frequency remains unchanged.

Frequency remains unchanged with change of medium

CUET Exam Question No: 17

Which of the following is used to produce radio waves of constant amplitude?

Option A :  Oscillator

Option B : FET

Option C :  Rectifier

Option D : Amplifier

Option A: Oscillator

Oscillator is used to produce ratio waves of constant amplitude.

CUET Physics Practice Questions No: 18

In an electromagnetic wave, the electric and magnetic fields are 100 V/m and 0.265 A/m. The maximum energy flow will be

Option A : 79 W/m2

Option B : 13.2 W/m2

Option C : 53 W/m2

Option D :  26.5 W/m2

Option D: 26.5 W/m2

Maximum energy flow in an electromagnetic wave,

= Eo Bo = ( 100 v / m ) (0.265 A / m )

CUET Physics Sample Paper Question No: 19

Electromagnetic wave travel in a medium which has relative premeability 1.3 and relative permeability 2.14. The speed of e.m. wave in the medium will be

Option A :  13.6 × 106 m/s

Option B :  1.8 × 102 m/s

Option C : 36 × 108

Option D : 1.8 × 108 m/s

Option D: 1.8 × 108 m/s

CUET Physics Mock Test Question No: 20

A small metallic ball is charged positively and negatively in a sinusoidal manner at a frequency of 106 cps. The maximum charge on the ball is 10–6 cps. What is the displacement current due to the alternating current?

Option A : 6.28 A

Option B : 3.8 A

Option C :  3.75 × 10–4A

Option D : 122.56A

Option D: 6.28 A

CUET Physics Question No: 21

The electric and magnetic fields of an electromagnetic wave are

Option A : in opposite phase and perpendicular to each other

Option B : in opposite phase and parallel to each other

Option C : in phase and perpendicular to each other

Option D : in phase and parallel to each other