General Physics Questions And Answers


Q1. 
The nuclear force is short-ranged.

Ans.
True


Q2. 
What is the main result of nuclear fission?

Ans.
Barium


Q3. 
Uranium 235 mass should be greater than X, then it is capable of continuous fission by itself. Identify X.

Ans.
Critical size


Q4. 
Which of the following forms the basis of a nuclear reactor?

Ans.
Controlled chain reaction


Q5. 
Controlled chain reactions form the basis of an atomic bomb.

Ans.
False


Q6. 
At absolute zero, Si acts as which of the following?

Ans.
Insulator


Q7. 
A piece of copper and another of germanium are cooled from room temperature to 77 K. what will impact on the resistance of each of them?

Ans.
Copper strip decreases and that of germanium increases


Q8. 
In semiconductors at room temperature, which of the following is likely to happen?

Ans.
The valence band is partially empty and the conduction band is partially filled


Q9. 
At absolute zero temperature, a semiconductor acts as a conductor.

Ans.
False


Q10. 
Which of the following is true regarding insulators?

Ans.
The valence band is partially filled with electrons