Electronics Basic Quiz Rectification

A pn junction acts as a

• controlled switch

• bidirectional switch

• unidirectional switch

• none of the above

A reverse biased pn junction has

• very narrow depletion layer

• almost no current

• very low resistance

• large current flow

With forward bias to a pn junction, the width of depletion layer

• decreases

• increases

• remains the same

• none of the above

A crystal diode is used as

• an amplifier

• a rectifier

• an oscillator

• a voltage regulator

An ideal crystal diode is one which behaves as a perfect ................. when forward biased.

• conductor

• insulator

• resistance material

• none of the above

Mains a.c power is converted into dc power for

• lighting purposes

• heaters

• using in electronic equipment

• none of the above

Half Wave rectifier uses

• 1 diode

• 2 diode

• 3 diodes

• 4 diodes

Centre tapped Full wave rectifier uses

• 1 diode

• 2 diodes

• 3 diodes

• 4 diodes

Bridge rectifier uses

• 1 diode

• 2 diodes

• 3 diodes

• 4 diodes

The disadvantage of a half wave rectifier is that the .................

• components are expensive

• diodes must have a higher power rating

• output is difficult to filter

• none of the above