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

None

The peak value of the input to a half-wave rectifier is 10 V. The approximate peak value of the output is

10.7 V

9.3 V

3.18 V

10 V

None

Which two elements in a field effect transistor exhibit fairly similar characteristics?

Source and drain

Gate and drain

Source and gate

Source and base

None

In order for a diode to conduct, it must be:

reverse-biased

close coupled

forward-biased

enhanced

None

Line regulation is determined by

changes in output voltage and input voltage

zener current and load current

changes in load resistance and output voltage

load current

None

If alternating current is applied to the anode of a diode, what would you expect to see at the cathode?

Steady direct current

No signal

Pulsating alternating current

Pulsating direct current

None

For a silicon diode, the value of the forward-bias voltage typically

depends on the width of the depletion region

must be greater than 0.3 V

depends on the concentration of majority carriers

must be greater than 0.7 V

None

A 60 V peak full-wave rectified voltage is applied to a capacitor-input filter. If f = 120 Hz. RL = 10 k Ω and C = 10 μF, the ripple voltage is

6 mV

5.0 V

0.6 V

2.88 V

None

The total secondary voltage in a center-tapped full-wave rectifier is 125 rms. Neglecting the diode drop, the rms output voltage is

117 Hz

100 V

125 V

62.5 V

None

When the rms output voltage of a bridge full wave rectifier is 20 V, the peak inverse voltage across the diodes is (neglecting the diode drop)

20 V

40 V

28.3 V

56.6 V

None

For a certain 12 V zener diode, a 10 mA change in zener current produces a 0.1 V change in zener voltage. The zener impedance for this current ranges is

0.1 Ω

100 Ω

10 Ω

1 Ω

None

The primary purpose of a Zener diode is to:

regulate or maintain a constant voltage

provide a voltage phase shi

to boost the power supply voltage

provide a path through which current can flow

None

The three leads from a PNP transistor are named:

drain, base and source

collector, source and drain

collector, emitter and base

gate, source and drain

None

The average value of a full-wave rectified voltage with a peak value of 75 V is

37.5 V

47.8 V

53 V

23.9 V

None

Which configuration has unity voltage gain (ideal)

CE followed by CB

a Common Emitter (CE

a Common Collector (CC)

a Common Base (CB)

None

JFET is a

Current controlled device with high input resistance

Voltage Controlled Voltage Source (VCVS)

Current Controlled Current Source (CCCS

Voltage controlled device with high input resistance

None

The basic semi-conductor amplifying device is the:

tube

diode

P-N junction

transistor

None

Compared to bipolar transistors, field effect transistors are NOT normally characterized by:

low input impedance

a reverse-biased PN junction

high input impedance

low power consumption

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:

detection

rectification

modulation

amplification

None

A transistor can be destroyed in a circuit by:

saturation

excessive light

excessive heat

cut-off

None

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