General Physics Questions And Answers


Q1. 
How many elements are essential for any communication system?

Ans.
3


Q2. 
Which of the following is the purpose of the transmitter?

Ans.
Converting the signal into a suitable form


Q3. 
Which among the following can be an input to a transmitter?

Ans.
Electric signal


Q4. 
A channel can be either in the form of wires or wireless.

Ans.
True


Q5. 
Which of the following is the reason for signal distortion?

Ans.
Channel imperfection


Q6. 
What is the refractive index of the ionosphere?

Ans.
Less than one


Q7. 
The biological importance of the ozone layer is to stop the greenhouse effect.

Ans.
False


Q8. 
What is the physical significance of the Ozone layer in the atmosphere?

Ans.
Stops ultraviolet radiation


Q9. 
The phase difference between space current and capacitive displacement current is 0 rad, when radio waves undergo the ionosphere.

Ans.
True


Q10. 
What is the modulation used to?

Ans.
Reduce the bandwidth used