Diodes and Transistors

MCQTrip.com will help you test your knowledge of diodes and transistors, including types, construction, operation, applications, biasing, etc, with this online multiple choice quiz. See how well you understand the basics of these electronic components. Twenty (20) MCQ questions from our test bank will be randomly shown for every attempt. Passing mark for this test is 70%.

Objectives: To provide an online multiple choice quiz to test the reader’s knowledge of diodes and transistors.

Welcome to Diodes and Transistors. The quiz will randomly run 20 questions from Diodes and Transistors which you have to answer in 10 minutes.

After 10 minutes, your quiz will automatically be submitted and scored.

You can retake the quiz as many times as you want and a different set of questions will be given. The answers will also be randomly arrange.

Please click START QUIZ to start

Line regulation is determined by

zener current and load current

load current

changes in output voltage and input voltage

changes in load resistance and output voltage

None

When diode is forward-biased

the only current is produced by majority carriers

the only current is electron current

the only current is hole current

the current is produced by both holes and electrons

None

The three leads from a PNP transistor are named:

collector, emitter and base

gate, source and drain

collector, source and drain

drain, base and source

None

If a low level signal is placed at the input to a transistor, a higher level of signal is produced at the output lead. This effect is know as:

modulation

rectification

detection

amplification

None

If the load resistance of a capacitor-filtered full-wave rectifier is reduced, the ripple voltage

increases

decreases

is not affected

has a different frequency

None

Bipolar transistors usually have:

2 leads

4 leads

1 lead

3 leads

None

The average value of a half-wave rectified voltage with a peak value of 200 V is

141 V

63.7 V

127.3 V

0 V

None

A transistor can be destroyed in a circuit by:

saturation

excessive heat

cut-off

excessive light

None

Which component can amplify a small signal using low voltages?

A variable resistor

An electrolytic capacitor

A multiple-cell battery

A PNP transistor

None

The action of changing alternating current to direct current is called:

rectification

amplification

modulation

transformation

None

The approximate voltage across the forward-biased base emitter junction of a silicon BJT is

0 V

0.3 V

0.7 V

0.4 V

None

The ideal dc output voltage of a capacitor-input filter is equal to

the peak value of the rectified voltage

the average value of the rectified voltage

the rms value of the rectified voltage

None

Which of the following diodes is operated in reverse bias mode ?

P-N junction

Schottky

Zener

Tunnel

None

Zener diodes are used as:

current regulators

voltage regulators

RF detectors

AF detectors

None

Pinch-off voltage VP for an FET is the drain voltage at which

drain current becomes zero

significant drain current starts flowing

avalanche break down takes place

all free charges get removed from the channel

None

When the peak output voltage is 100 V, the PIV for each diode in a center-tapped full-wave rectifier is (neglecting the diode drop)

100 V

141 V

50 V

200 V

None

The varactor diode is usually

Forward biased

reverse biased

Unbiased

holes and electronics

None

Zener diodes are most commonly used in:

power supply circuits

current limiting circuits.

oscillator circuits

voltage amplifier circuits

None

A semiconductor is described as a "general purpose audio NPN device". This would be:

a bipolar transistor

an audio detector

a triode

a silicon diode

None

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