Diode Circuits MCQs

Question 1

When the crystal diode current is large, the bias is

Accepted Answer

forward

Answer

inverse

Answer

poor

Answer

reverse

Question 2

When a crystal diode is usedas a rectifier, the most important consideration is

Accepted Answer

PIV rating

Answer

forward characteristic

Answer

doping level

Answer

reverse eharacteristic

Question 3

If the doping level in a crystal diode is increased, the width of depletion layer

Accepted Answer

is increased

Answer

remains the same

Answer

is decreased

Answer

none of the above

Question 4

A zener diode utilises characteristic for its operation.

Accepted Answer

reverse

Answer

forward

Answer

both forward and reverse

Answer

none of the above

Question 5

In the breakdown region, a zener diode behaves like a ____ source.

Accepted Answer

constant voltage

Answer

constant current

Answer

constant resistance

Answer

none of the above

Question 6

A zener diode is destroyed if it

Accepted Answer

carries more than rated current

Answer

is forward biased

Answer

is reverse biased

Answer

none of the above

Question 7

A series resistance is connected in the zener ciruit to

Accepted Answer

protect the zener

Answer

properly reverse bias the zener

Answer

properly forward bias the zener

Answer

none of the above

Question 8

Mains a.c. power is converted into d.c. power for

Accepted Answer

using in electronic equipment

Answer

lighting purposes

Answer

heaters

Answer

none of the above

Question 9

The disadvantage of a half-wave rectifier is that the

Accepted Answer

output is difficult to filter

Answer

components are expensive

Answer

diode must have a higher power rating

Answer

none of the above