# Electromagnetic Waves (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 27 - 31 of 31

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## Question number: 27

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

MCQ▾

### Question

The electric field of a plane electromagnetic wave in vacuum is represented by

. Determine the wavelength of the wave.

### Choices

Choice (4) Response

a.

5m

b.

4 m

c.

6 m

d.

3 m

## 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.

b.

c.

d.

f Page