# Electromagnetic Waves (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 10 - 15 of 31

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## Question number: 10

» Electromagnetic Waves » Applications of Electromagnetic Waves

MCQ▾

### Question

If TV signals are to b received by the ground waves with in a range D, the height of the TV tower should be, (R is the radius of earth)

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 11

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

MCQ▾

### Question

Which of the following waves have minimum frequency?

### Choices

Choice (4) Response

a.

Audible waves

b.

c.

Microwaves

d.

Ultrasonic waves

## Question number: 12

» Electromagnetic Waves » Electromagnetic Spectrum » X-Rays

MCQ▾

### Question

If λ = 10 Å, then it correspond to

### Choices

Choice (4) Response

a.

X-rays

b.

Infrared waves

c.

Microwaves

d.

Ultraviolet waves

## Question number: 13

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 14

» Electromagnetic Waves » Electromagnetic Spectrum » Ultraviolet

Assertion-Reason▾

### Assertion (Ꭺ)

Ultraviolet radiations are of higher frequency waves and are dangerous to human being.

### Reason (Ꭱ)

Ultraviolet radiations are absorbed by the atmosphere.

### Choices

Choice (4) Response

a.

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

b.

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

c.

Both Ꭺ and Ꭱ are false

d.

Ꭺ is true but Ꭱ is false

## Question number: 15

» Electromagnetic Waves » Applications of Electromagnetic Waves

MCQ▾

### Question

If E and B be the electric and magnetic field of E. M. wave then the direction of propagation of E. M. wave is along the direction.

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page