1. What is the primary function of a Varistor diode?
A. To rectify AC b) To limit the voltage to a safe level c) To amplify
weak signals d) To emit light
Answer: b) To limit the voltage to a safe level Rationale: Varistors are
used to protect circuits from voltage spikes by limiting the voltage to a
safe level when the voltage exceeds a certain threshold.
2. Which type of diode has a very small forward voltage drop, typically
less than 0.3V?
A. Schottky diode b) Zener diode c) Tunnel diode d) Silicon diode
Answer: a) Schottky diode Rationale: Schottky diodes are known for
their low forward voltage drop, which is typically less than 0.3V,
making them efficient in high-speed circuits.
3. Which of the following is the main advantage of a Light Emitting
Diode (LED) over an incandescent bulb?
A. LED consumes more power b) LED generates more heat c) LED has
a longer lifespan d) LED emits more light
Answer: c) LED has a longer lifespan Rationale: LEDs have a much
longer lifespan than incandescent bulbs and are more energy-efficient.
4. Which type of diode is used to regulate voltage in a circuit?
,A. Zener diode b) Light Emitting Diode (LED) c) Schottky diode d)
Tunnel diode
Answer: a) Zener diode Rationale: Zener diodes are designed to operate
in the reverse breakdown region and provide a stable reference voltage,
making them ideal for voltage regulation.
5. What is the primary function of a rectifier diode?
A. To amplify signals b) To convert AC to DC c) To emit light d) To
regulate voltage
Answer: b) To convert AC to DC Rationale: Rectifier diodes are used in
power supplies to convert alternating current (AC) into direct current
(DC) by allowing current to flow in one direction only.
6. What is the main purpose of a diode in a surge protection circuit?
A. To amplify signals b) To allow excessive current to flow through c)
To block voltage spikes d) To store energy
Answer: c) To block voltage spikes Rationale: Diodes are used in surge
protection circuits to prevent high-voltage spikes from damaging
sensitive components by clamping the voltage to a safe level.
7. What is a typical application for a tunnel diode?
A. High-frequency switching b) Low-power rectification c)
Amplification in microwave circuits d) Voltage regulation
Answer: c) Amplification in microwave circuits Rationale: Tunnel
diodes are used in high-speed, high-frequency applications, such as
, microwave circuits, due to their ability to operate at extremely fast
speeds.
8. Which of the following diodes is primarily used in a voltage
reference circuit?
A. Zener diode b) Schottky diode c) LED d) Photodiode
Answer: a) Zener diode Rationale: Zener diodes are used in voltage
reference circuits because they maintain a constant voltage in reverse
bias after reaching their breakdown voltage.
9. In a diode, what does the term “breakdown voltage” refer to?
A. The voltage required for current to start flowing b) The maximum
voltage the diode can withstand in reverse bias before damage occurs c)
The minimum voltage required to reverse bias the diode d) The voltage
drop when the diode is forward biased
Answer: b) The maximum voltage the diode can withstand in reverse
bias before damage occurs Rationale: The breakdown voltage refers to
the voltage beyond which
the diode will undergo avalanche breakdown or Zener breakdown,
depending on the type of diode.
10. What is the peak inverse voltage (PIV) of a diode?
A. The maximum forward voltage a diode can handle b) The maximum
reverse voltage a diode can withstand without breaking down c) The
A. To rectify AC b) To limit the voltage to a safe level c) To amplify
weak signals d) To emit light
Answer: b) To limit the voltage to a safe level Rationale: Varistors are
used to protect circuits from voltage spikes by limiting the voltage to a
safe level when the voltage exceeds a certain threshold.
2. Which type of diode has a very small forward voltage drop, typically
less than 0.3V?
A. Schottky diode b) Zener diode c) Tunnel diode d) Silicon diode
Answer: a) Schottky diode Rationale: Schottky diodes are known for
their low forward voltage drop, which is typically less than 0.3V,
making them efficient in high-speed circuits.
3. Which of the following is the main advantage of a Light Emitting
Diode (LED) over an incandescent bulb?
A. LED consumes more power b) LED generates more heat c) LED has
a longer lifespan d) LED emits more light
Answer: c) LED has a longer lifespan Rationale: LEDs have a much
longer lifespan than incandescent bulbs and are more energy-efficient.
4. Which type of diode is used to regulate voltage in a circuit?
,A. Zener diode b) Light Emitting Diode (LED) c) Schottky diode d)
Tunnel diode
Answer: a) Zener diode Rationale: Zener diodes are designed to operate
in the reverse breakdown region and provide a stable reference voltage,
making them ideal for voltage regulation.
5. What is the primary function of a rectifier diode?
A. To amplify signals b) To convert AC to DC c) To emit light d) To
regulate voltage
Answer: b) To convert AC to DC Rationale: Rectifier diodes are used in
power supplies to convert alternating current (AC) into direct current
(DC) by allowing current to flow in one direction only.
6. What is the main purpose of a diode in a surge protection circuit?
A. To amplify signals b) To allow excessive current to flow through c)
To block voltage spikes d) To store energy
Answer: c) To block voltage spikes Rationale: Diodes are used in surge
protection circuits to prevent high-voltage spikes from damaging
sensitive components by clamping the voltage to a safe level.
7. What is a typical application for a tunnel diode?
A. High-frequency switching b) Low-power rectification c)
Amplification in microwave circuits d) Voltage regulation
Answer: c) Amplification in microwave circuits Rationale: Tunnel
diodes are used in high-speed, high-frequency applications, such as
, microwave circuits, due to their ability to operate at extremely fast
speeds.
8. Which of the following diodes is primarily used in a voltage
reference circuit?
A. Zener diode b) Schottky diode c) LED d) Photodiode
Answer: a) Zener diode Rationale: Zener diodes are used in voltage
reference circuits because they maintain a constant voltage in reverse
bias after reaching their breakdown voltage.
9. In a diode, what does the term “breakdown voltage” refer to?
A. The voltage required for current to start flowing b) The maximum
voltage the diode can withstand in reverse bias before damage occurs c)
The minimum voltage required to reverse bias the diode d) The voltage
drop when the diode is forward biased
Answer: b) The maximum voltage the diode can withstand in reverse
bias before damage occurs Rationale: The breakdown voltage refers to
the voltage beyond which
the diode will undergo avalanche breakdown or Zener breakdown,
depending on the type of diode.
10. What is the peak inverse voltage (PIV) of a diode?
A. The maximum forward voltage a diode can handle b) The maximum
reverse voltage a diode can withstand without breaking down c) The
