Wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

diode

Total questions: 20

Worksheet time: 16mins

Name
Class
Date
1.

a crystal diode has..................

a)

one pn junction

b)

two pn junction

c)

three pn junction

2.

the forward voltage drop across a silicon diode is about

a)

0.7v

b)

2.5v

c)

3v

3.

a zener diode is used as

a)

an amplifier

b)

a rectifier

c)

a voltage regulator

4.

a zener diode is always ................connected

a)

forward

b)

reverse

c)

either reverse or forward

5.

the maximum efficiency of a half wave rectifier is .....

a)

40.6%

b)

81.2%

c)

50%

6.

the most widely used recrifier is................

a)

half wave rectifier

b)

centre tap full wave rectifier

c)

bridge full wave rectifier

7.

if the arrow of crystal diode symbol is positive with respect to bar,then diode is .............biased

a)

reverse

b)

forward

c)

none

8.

bridge rectifier has how many no of diodes

a)

1

b)

2

c)

4

9.

a device which converts ac signal to dc signal

a)

amplifier

b)

rectifier

c)

transformeer

10.

......................is a device which removes the ac component of rectifier output

a)

filter

b)

amplifier

c)

voltage regulator

11.

the ratio of rms value of ac component to the dc component in the rectifier output is called...............

a)

maximum value

b)

ripple factor

c)

average value

12.

the short name of inductor coil is

a)

capacitor

b)

choke

c)

resistor

13.

which diode has a sharp breakdown voltage

a)

led

b)

photodiode

c)

zenerdiode

14.

is the symbol of which diode

a)

varactor

b)

zenerdiode

c)

LED

15.

symbol of which diode

a)

zenerdiode

b)

varactor diode

c)

pn diode

16.

a pn junction that radiates energy as light instead of as as heat is called

a)

LED

b)

photo diode

c)

zener diode

17.

a photo diode is normally

a)

forward bias

b)

reverse bias

c)

none

18.

when the reverse voltage increases the junction capacitance

a)

decreases

b)

increases

c)

constant

19.

when the light increases, the reverse current in photo diode

a)

increases

b)

decreases

c)

unaffected

20.

......................diode is a PNPN device having two terminal

a)

zener

b)

varactor

c)

shockley