General Physics Questions And Answers


Q1. 
In a pure semiconductor crystal, if current flows due to breakage of crystal bonds, then what is the semiconductor is called?

Ans.
Intrinsic semiconductor


Q2. 
Which of the following, when added as an impurity, into the silicon, produces n-type semiconductor?

Ans.
Phosphorous


Q3. 
In n-type semiconductors, which one is the majority charge carriers?

Ans.
Electrons


Q4. 
A small impurity is added to germanium to get a p-type semiconductor. Identify the impurity?

Ans.
Trivalent substance


Q5. 
Boron when added as an impurity, into the silicon, produces n-type semiconductor.

Ans.
False


Q6. 
When a junction diode is reverse biased, what causes current across the junction?

Ans.
Drift of charges


Q7. 
Identify the condition for a transistor to act as an amplifier.

Ans.
The emitter-base junction is forward biased and the base-collector junction is reverse biased


Q8. 
What can a p-n junction diode be used as?

Ans.
Rectifier


Q9. 
What is a transistor made up of?

Ans.
Semiconductor


Q10. 
What is a rectifier used for?

Ans.
Convert ac voltage to dc voltage