Transistors: A semiconductor device used to amplify or switch electrical signals and power

This is an MCQ-based quiz on Transistors.

This includes collector, base, emitter, collector-base-junction, reverse bias, and wide depletion layer

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If transistor is to be operated with collector emitter voltage of 6 V and maximum power rating is 250mW then collector current will be

41.7 mA 41.7 µA 41.7 A 4.17 mA

Transistors was invented by

William Shockley Lisa Meitner and George Stephenson Otto Hahn John Bardeen and Walter Brattain

If voltage at base of transistor is 5 V and base current is 5 µA then input resistance at base is

1 µ Ω 1 mΩ 1 MΩ 10 Ω

Ratio of maximum power dissipation and collector emitter voltage is

Collector current

Base current

Emitter current

Floating current

If Q of an LC circuit increases, then bandwidth ___________

Increases Decreases Remains the same Insufficient data

In a transistor ___________

IC = IE + IB IB = IC + IE IE = IC - IB IE = IC + IB

In the double tuned circuit, if the mutual inductance between the two tuned circuits is decreased, the level of resonance curve ___________

Remains the same Is lowered Is raised None of the above

DC operating point of transistor is also known as

Quiescent point

Load point

Amplification point

Junction point

The leakage current in CE arrangement is ___________ that in CB arrangement

More than

Less than

The same as

None of the above

Which junction is forward biased when transistor is used as an amplifier?

Emitter-Base Emitter-Collector Collector-Base No junction is forward biased

In the output characteristics, the resistance is the __________

Slope of the curve Trace of the curve Asymptote of the curve Reciprocal of the slope of the curve

In a CE transmitter amplifier, if the amplification factor is 150 and the collector voltage is 4 V and resistance is 2 kΩ, what should be the value of RB, given that the dc base current is 10 times the signal current?

5 kΩ 10 kΩ 15 kΩ 20 kΩ

A low input to the transistor gives __________

Low output High Output Normal Output No Output

The output in an oscillator is __________

Discontinuous Oscillating Self-sustained Spiked

The arrow in the symbol of a transistor indicates the direction of ___________

Electron current in the emitter

Electron current in the collector

Hole current in the emitter

Donor ion current

A transistor has …………………

One pn junction

Two pn junctions

Three pn junctions

Four pn junctions

In a pnp transistor, the current carriers are ………….

Acceptor ions

Donor ions

Free electrons

Holes

The element that has the biggest size in a transistor is ………………..

Collector

Base

Emitter

Collector-base-junction

The number of depletion layers in a transistor is …………

Four

Three

One

Two

The base of a transistor is ………….. doped

Heavily

Moderately

Lightly

None of the above

Quiz/Test Summary

Title: Transistors: A semiconductor device used to amplify or switch electrical signals and power

Questions: 20

Contributed by:

Diego Thu, Mar 17, 2022 01:01 PM UTC

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