Diode Circuits MCQs

Question 1

If, by mistake, ac source in a bridge rectifier is connected across the dc terminals, it will burn out and hence short

Accepted Answer

four

Answer

one

Answer

two

Answer

three

Question 2

The main job of a voltage regulator is to-provide a nearly?output voltage.

Accepted Answer

constant

Answer

sinusoidal

Answer

smooth

Answer

fluctuating

Question 3

A 10-V dc regulator power supply has a regulation of 0.005 per cent. Its output voltage will vary within an envelope of ___ millivolt.

Accepted Answer

2.5

Answer

? 0.5

Answer

5

Answer

? 0.05

Question 4

An ideal voltage regulator has a voltage regulation of

Accepted Answer

0

Answer

1

Answer

100

Answer

50

Question 5

In a Zener diode shunt voltage regulator, the diode regulates so long as it is kept in condition.

Accepted Answer

reverse

Answer

forward

Answer

loaded

Answer

unloaded

Question 6

The power efficiency of a switching voltage regulator is much higher than that of a linear regulator because it operates.

Accepted Answer

like a switch

Answer

in saturation

Answer

in cut-off

Answer

on high duty cycle

Question 7

A transistor series voltage regulator is called emiter-follower regulator because the emitter of the pass transistor follows the voltage.

Accepted Answer

base

Answer

output

Answer

input

Answer

collector

Question 8

In an op-amp series voltage regulator, output voltage depends on

Accepted Answer

both (a) and (b)

Answer

Zener voltage

Answer

voltage divider resistors

Answer

output voltage

Question 9

In a feedback series regulator circuit, the output voltage is regulated by controlling the

Accepted Answer

voltage drop across the series pass transistor

Answer

magnitude of input voltage

Answer

gain of the feedback transistor

Answer

reference voltage