Question 1

What is the function of the emitter in an NPN transistor?

Accepted Answer

Injecting majority charge carriers into the base

Answer

Amplifying the signal

Answer

Blocking the flow of current

Answer

Controlling the flow of current

Question 2

What happens when a forward bias voltage is applied to a PN junction diode?

Accepted Answer

Current flows easily in the forward direction

Answer

Current flows easily in the reverse direction

Answer

The diode stops working

Answer

No current flows in either direction

Question 3

What is the role of the collector in an NPN transistor?

Accepted Answer

Collecting majority charge carriers that pass through the base

Answer

Modulating the input signal

Answer

Providing mechanical support

Answer

Amplifying the output signal

Question 4

What happens to the resistance of a forward biased PN junction diode?

Accepted Answer

It decreases

Answer

It remains constant

Answer

It becomes infinite

Answer

It increases

Question 5

What is the purpose of the base region in an NPN transistor?

Accepted Answer

Controlling the flow of current between the emitter and collector

Answer

Blocking the flow of current

Answer

Generating the majority charge carriers

Answer

Providing mechanical support

Question 6

What is the symbol used to represent an NPN transistor in circuit diagrams?

Accepted Answer

A triangle with an arrow pointing outwards

Answer

A square with two parallel lines inside

Answer

A circle with a diagonal line through it

Answer

A curved line with a dot at one end

Question 7

What happens when a reverse bias voltage is applied to a PN junction diode?

Accepted Answer

The depletion region widens and current flow is minimal

Answer

The diode stops working

Answer

The depletion region narrows and current flow is maximum

Answer

The diode conducts current in both directions

Question 8

What is the main function of the PN junction in a diode?

Accepted Answer

Allowing current to flow in one direction and blocking it in the other

Answer

Amplifying the signal

Answer

Regulating voltage levels

Answer

Generating electrical power

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