# Electromagnetic Waves (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 1 - 5 of 43

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## Question number: 1

» Electromagnetic Waves » Electromagnetic Spectrum » Radio Waves

Edit
Assertion-Reason▾

### Reason (Ꭱ)

Sound waves in air are longitudinal in nature.

### Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is true but Ꭱ is false

d.

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

## Question number: 2

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

Edit
MCQ▾

### Question

A point source of 2 watt is radiating uniformly in all direction in vacuum. Find the amplitude of electric field at a distance 2m from it-

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 3

» Electromagnetic Waves » Applications of Electromagnetic Waves

Edit
MCQ▾

### Question

If λ ν , λ x and λ m represent the wavelength of visible light, x-rays, and microwaves respectively, then

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 4

» Electromagnetic Waves » Applications of Electromagnetic Waves

Edit
MCQ▾

### Question

In an EM wave the amplitude of electric field is 10 V/m. The frequency of wave is 5 x 10 4 Hz. The wave is propagating along Z-axis. Then the average energy density of magnetic field is-

### Choices

Choice (4) Response

a.

2 x 10 -10 J/m 3

b.

2.21 x 10 -8 J/m 3

c.

2.21 x 10 -10 J/m 3

d.

2 x 10 -8 J/m 3

## Question number: 5

» Electromagnetic Waves » Applications of Electromagnetic Waves

Edit
MCQ▾

### Question

Which of the following pairs of space and time varying E and B fields would generate a plane electromagnetic wave travelling in (-Z) direction?

### Choices

Choice (4) Response

a.

E Z, B Y

b.

E Y, B X

c.

E X, B Y

d.

E X, B Z

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