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Electron Devices : Surprise Quiz -2

Authored by Ragavapriya krishnasamy

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Electron Devices : Surprise Quiz -2
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a Tunnel Diode, what causes the negative resistance region in its I-V characteristics?

Recombination of minority carriers

Avalanche breakdown

Quantum tunneling through a narrow depletion layer

High injection level of majority carriers

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A Unijunction Transistor (UJT) is used in a triggering circuit. Which of the following characteristics is critical for its operation?

Peak inverse voltage

Valley point voltage

Early voltage

Saturation current

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why are Avalanche Photodiodes preferred in optical communication receivers over PIN diodes?

Lower response time

Higher noise margin

Internal gain due to impact ionization

Simpler biasing requirements

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a MESFET, the metal-semiconductor junction acts as:

A forward-biased base

A rectifier

A conducting channel

A reverse-biased gate

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What advantage do TFETs (Tunnel Field-Effect Transistors) offer over conventional MOSFETs in low-power digital circuits?

Higher threshold voltage

Larger gate capacitance

Steeper subthreshold slope

Higher drive current

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

HEMTs (High Electron Mobility Transistors) are typically made using which materials to achieve high electron mobility?

Silicon and silicon dioxide

GaAs and AlGaAs

Germanium and polysilicon

Indium and tin oxide

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a varactor diode, how does the capacitance vary with reverse bias voltage?

Increases linearly

Decreases exponentially

Remains constant

Inversely with the square root of voltage

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