PN junction

A full wave bridge rectifier has an efficiency of ------

• 100

• 91.2

• 81.2

• 40.6

A zener diode is used as a ......

• rectifier

• amplifier

• oscillator

• voltae regulator

A device that convert ac into dc is known as ....

• rectifier

• amplifier

• oscillator

• voltage regulator

Barrier potential of germanium diode at room temperature is

• 0.3 V

• 0.5 V

• 0.7 V

• 0.9 V

Ripple factor of a half wave rectifier is

• 0.12

• 0.48

• 1.21

• 1

In a transistor emittor base junction has

• zero resistance

• low resistance

• high resistance

• infinite resistance

Collector of a transistor will be

• less doped

• moderately doped

• heavily doped

• without doped

Rectifier that can be used for high voltage applications is

• half wave rectifier

• centre tap full wave rectifier

• bridge rectifier

• all the above

Number of diodes used in centre tap rectifier is

• 1

• 2

• 3

• 4

zener diodes uually operated in

• forward bias

• reverse bias

• above knee voltage

• none of these