Electromagnetic Waves (NEET Physics): Questions 28 - 31 of 31

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Question number: 28

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

MCQ▾

Question

A magnetic field of a plane electromagnetic wave is given by B = 2x10 7 sin (0.5x10 3 x + 1.5x10 11 t) T. Frequency of the wave is,

Choices

Choice (4) Response

a.

33.9 GHz

b.

13.9 GHz

c.

23.9 GHz

d.

12.9 GHz

Question number: 29

» Electromagnetic Waves » Electromagnetic Spectrum » Gamma Rays

MCQ▾

Question

Which of the following radiations has the least wavelength?

Choices

Choice (4) Response

a.

β - rays

b.

X - rays

c.

γ - rays

d.

α - rays

Question number: 30

» Electromagnetic Waves » Electromagnetic Spectrum » Others

MCQ▾

Question

The frequency of 3 to 30 kHz is known as,

Choices

Choice (4) Response

a.

Ultra high frequency band

b.

Medium frequency band

c.

High frequency band

d.

Audio band

Question number: 31

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

MCQ▾

Question

Light is an electromagnetic wave. Its speed in vacuum is given by the expression,

Choices

Choice (4) Response

a.

μ0ε0

b.

ε0μ0

c.

μ0ε0

d.

1μ0ε0

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