Electronic Devices and Circuits Theory Semiconductor Questions with Answers

Electronic Devices and Circuits Theory–Semiconductor questions with answers are an essential part of electronics aptitude and competitive exams like GATE, ISRO, DRDO, and BARC. These aptitude questions and answers with explanations help students understand how semiconductors function in electronic circuits, including diodes, transistors, and PN junction theory. Practicing aptitude questions with solutions PDF versions allows learners to strengthen their problem-solving and analytical thinking in semiconductor physics. For aspirants preparing for placement tests or technical interviews, mastering semiconductor basics is crucial for scoring high and building solid conceptual clarity. Explore these aptitude test practice online sets to enhance your preparation effectively.

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A silicon diode measures a low value of resistance with the meter leads in both positions. The trouble, if any, is

A the diode is open.
B the diode is shorted to ground.
C the diode is internally shorted.
D the diode is working correctly.

Answer: Option C

Single-element semiconductors are characterized by atoms with ____ valence electrons.

Answer: Option B

Under normal conditions a diode conducts current when it is

A reverse-biased
B forward-biased.
C avalanched.
D saturated.

Answer: Option B

A diode conducts when it is forward-biased, and the anode is connected to the ________ through a limiting resistor.

A positive supply
B negative supply
C cathode
D anode

Answer: Option A

As the forward current through a silicon diode increases, the internal resistance

A increases.
B decreases.
C remains the same.

Answer: Option B

The movement of free electrons in a conductor is called

A voltage.
B current.
C recombination.
D equilibrium.

Answer: Option B

For a forward-biased diode, the barrier potential ________ as temperature increases.

A decreases
B remains constant
C increases

Answer: Option A

An n-type semiconductor material

A is intrinsic.
B has trivalent impurity atoms added.
C has pentavalent impurity atoms added.
D requires no doping.

Answer: Option C

For a forward-biased diode, as temperature is ________, the forward current ________ for a given value of forward voltage.

A decreased, increases
B increased, increases
C increased, decreases
D decreased, decreases

Answer: Option B

Q10

Which statement best describes an insulator?

A A material with many free electrons.
B A material doped to have some free electrons.
C A material with few free electrons.
D No description fits.

Answer: Option C

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Electronic Devices and Circuits Theory-Semiconductor Questions and Answers

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Electronic Devices and Circuits Theory-Semiconductor Questions and Answers

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