MGVCL EXAM PAPER (30-07-2021 SHIFT 3) QUIZ

The forbidden energy gap between valance band and conduction band in semiconductor material is about

15 eV

None of these

1eV

0 eV

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Relaxation Voltage controlled oscillators are used to generate

Triangular wave

Sawtooth wave

Sinusoidal wave

Both B and C

TRUE ANSWER : ?
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The action of JFET in its equivalent circuit can best be represented as a

Current controlled Current source

voltage controlled current source

Voltage controlled voltage source

Current controlled voltage source

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CMOS devices use

class A operation.

bipolar transistors .

DMOS devices.

complementary E - MOSFETs.

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Which of the following is expected to have highest input impedance?

Common collector bipolar transistor

MOSFET.

CE bipolar transistor.

JEFT amplifier.

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Germanium has

molecular bond.

ionic bond.

metallic bond.

covalent bond.

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For a transistor amplifier with self- biasing network, the following components are used: R1 = 4 KÃŽÂ©, R2 = 4 KÃŽÂ© and RE = 1 KÃŽÂ©, the approximate value of stability factor will be

1.5.

3.

4.

2.

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For a JEFT, when VDS is increased beyond the pinch-off voltage, the drain electric current

increased.

first increase and then decreased.

decreases.

remains constant.

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Which material behave like perfect insulators at low temperatures & conductor at higher temperature ?

All the above

GaAs

Ge

Si

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In which mode of BJT operation are both junction forward biased

cut off.

active.

saturation.

reverse active.

TRUE ANSWER : ?
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