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Semiconductor MCQ 1

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Questions and Answers

What is the main factor responsible for the change in resistance of a semiconductor with increasing temperature?

Addition of small amounts of another element

Movement of charges

Type of semiconductors

Thermal agitation breaking bonds (correct)

What happens to the resistance of a thermistor as the temperature increases?

Remains constant

Fluctuates unpredictably

Decreases rapidly (correct)

Increases rapidly

Which type of semiconductors add more free positive holes available for conduction?

P type (e.g. Boron and Silicon) (correct)

Intrinsic semiconductors

N type (e.g. Phosphorus and silicon)

Extrinsic semiconductors

What is the function of a light-dependent resistor (LDR)?

Decreases resistance when light shines on it Signup and view all the answers

What do N type semiconductors (e.g. Phosphorus and silicon) add more of for conduction?

Free electrons Signup and view all the answers

What is the process of adding small amounts of another element to a pure semiconductor to increase its conductivity called?

Doping Signup and view all the answers

What is the movement of charges through a doped semiconductor referred to as?

Extrinsic conduction Signup and view all the answers

What kind of charge carriers can move across a P-N junction when it is formed?

Both holes and electrons Signup and view all the answers

When a semiconductor diode is connected in forward bias, what is required for current to flow?

Depletion layer to contain free majority charge carriers Signup and view all the answers

Which type of biasing allows a diode to act as an insulator?

Reverse bias Signup and view all the answers

What is the main function of a rectifier?

To convert a.c. to d.c. Signup and view all the answers