Electromagnetic Waves-Electromagnetic Waves & Characteristics (NEET Physics): Questions 5 - 10 of 15

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Question number: 5

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

MCQ▾

Question

Which of the following waves have minimum frequency?

Choices

Choice (4) Response

a.

Audible waves

b.

Radio waves

c.

Microwaves

d.

Ultrasonic waves

Question number: 6

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

MCQ▾

Question

The intensity of light from a source is 500πWm2 . Find the amplitude of electric field in this-wave-

Choices

Choice (4) Response

a.

23×10NC

b.

32×102NC

c.

3×102NC

d.

23×102NC

Question number: 7

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

MCQ▾

Question

Electromagnetic waves travel in a medium with a speed of 2 x 10 8 m/s. The relative permeability of the medium is 1. What is the relative permittivity of the medium?

Choices

Choice (4) Response

a.

-0.25

b.

2.25

c.

3.25

d.

1.25

Question number: 8

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

Assertion-Reason▾

Assertion (Ꭺ)

The electromagnetic waves of shorter wavelength can travel longer distances on earth’s surface than those of longer wavelengths.

Reason (Ꭱ)

Shorter the wavelength, the larger is the velocity of wave propagation.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

Both Ꭺ and Ꭱ are false

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

Question number: 9

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

MCQ▾

Question

Unit of expression µ 0ϵ 0 is,

Choices

Choice (4) Response

a.

m/s

b.

s/m

c.

s 2 /m 2

d.

m 2 /s 2

Question number: 10

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

MCQ▾

Question

Which of the following are electromagnetic waves?

(1) Cosmic rays (2) Gamma rays

(3) X-rays (4) β-rays

Select the correct answers and mark it according to the following codes:

Codes:

Choices

Choice (4) Response

a.

1 and 2 are correct

b.

1 and 3 are correct

c.

1, 2 and 3 are correct

d.

2 and 4 are correct

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