Communication System-Basic Elements of Communication System (NEET Physics): Questions 7 - 9 of 9

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Question number: 7

» Communication System » Basic Elements of Communication System

Assertion-Reason▾

Assertion (Ꭺ)

A dish antenna is highly directional.

Reason (Ꭱ)

This is because a dipole antenna is omnidirectional.

Choices

Choice (4) Response
a. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
b. Ꭺ is false but Ꭱ is true
c. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
d. Ꭺ is true but Ꭱ is false

Question number: 8

» Communication System » Basic Elements of Communication System

MCQ▾

Question

A laser is a coherent source because it contains,

Choices

Choice (4) Response
a.

Coordinated wave of many wavelengths

b.

Uncoordinated wave of a particular wavelength

c.

Many wavelengths

d.

Coordinated waves of a particular wavelength

Question number: 9

» Communication System » Basic Elements of Communication System

MCQ▾

Question

An antenna is a device,

Choices

Choice (4) Response
a.

That converts electromagnetic energy into radio frequency signal.

b.

That converts guided electromagnetic waves into free space electromagnetic waves and vice-versa.

c.

That converts radio frequency signal into electromagnetic energy.

d. All of the above

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