Diodes and Applications MCQs

Question 1

The area at the junction of p-type and n-type materials that has lost its majority carriers is called the

Accepted Answer

depletion region

Answer

barrier potential

Answer

n region

Answer

p region

Question 2

DC power should be connected to forward bias a diode as follows:

Accepted Answer

+ anode, – cathode

Answer

– anode, + cathode

Answer

– cathode, – anode

Answer

+ cathode, + anode

Question 3

At any given time in an intrinsic piece of semiconductor material at room temperature

Accepted Answer

All of the above

Answer

electrons drift randomly

Answer

recombination occurs

Answer

holes are created

Question 4

In a power supply diagram, which block indicates a pulsating dc output?

Accepted Answer

rectifier

Answer

transformer

Answer

filter

Answer

regulator

Question 5

List three diode packages:

Accepted Answer

small current package, large current package, clip package

Answer

clip package, DIP, small current package

Answer

DIP, small current package, large current package

Answer

small current package, large current package, and SIP

Question 6

The mimicking of an open/closed switch by a diode allows alternating current to be:

Accepted Answer

rectified

Answer

regulated

Answer

controlled

Answer

attenuated

Question 7

The average value of the half-wave rectified output voltage is approximately __________ of Vp.

Accepted Answer

31.8%

Answer

63.6%

Answer

70.7%

Answer

100%

Question 8

Typically the forward voltage on an LED is between _______ and ________.

Accepted Answer

1 V, 3 V

Answer

1.5 V, 3.7 V

Answer

0.7 V, 1.1 V

Answer

1 V, 6 V

Question 9

A two-diode rectifier will not operate without a _________.

Accepted Answer

center-tapped transformer

Answer

voltage regulator

Answer

capacitive filter

Answer

phase-inverting transformer