General Physics Questions And Answers


Q1. 
What is the function of the receiver?

Ans.
Operating on the received signal


Q2. 
What is the electrical analogue of the information produced by the source?

Ans.
Signal


Q3. 
What is defined as the largest distance between the source and the destination upto which a signal can be received with sufficient strength?

Ans.
Range


Q4. 
Identify the device which is a combination of a transmitter, an amplifier and a receiver which picks up a signal and retransmits it.

Ans.
Repeater


Q5. 
What refers to the band of frequencies of the original signal?

Ans.
Baseband


Q6. 
Identify the limitation of amplitude modification.

Ans.
Amplitude modulation suffers from noise


Q7. 
Why audio signals cannot be transmitted directly?

Ans.
The transmitting antenna length is very large and impracticable


Q8. 
What happens in a frequency modulated wave?

Ans.
Frequency varies with time


Q9. 
Modulation is a process of the superposing high-frequency audio signal on low-frequency radio-waves.

Ans.
False


Q10. 
Why is AM used for broadcasting in the communication systems?

Ans.
It is more noise immune than other modulation systems