ELECTRONIC DEVICES AND CIRCUITS QUIZ

In which of these is reverse recovery time nearly zero?

PIN diode

Tunnel diode

Schottky diode

Zener diode

TRUE ANSWER : ?
YOUR ANSWER : ?

An electron in the conduction band

Has lower energy than the electron in the valence band

Loses its charge easily

Has higher energy than the electron in the valence band

Jumps to the top of the crystal

TRUE ANSWER : ?
YOUR ANSWER : ?

A transistor has a current gain of 0.99 in the CB mode. Its current gain in the CC mode is

99

1.01

0.99

100

TRUE ANSWER : ?
YOUR ANSWER : ?

In a bipolar transistor, the emitter base junction has

Zero bias

Zero or reverse bias

Reverse bias

Forward bias

TRUE ANSWER : ?
YOUR ANSWER : ?

Permalloy is

A polymer

A conon-ferrous alloy used in aircraft industry

A nickel an iron alloy having high permeability

A variety of stainless steel

TRUE ANSWER : ?
YOUR ANSWER : ?

Silicon is not suitable for fabrication of light emitting diodes because it is

Direct band gap semiconductor

Wideband gap semiconductor

Narrowband gap semiconductor

An indirect band gap semiconductor

TRUE ANSWER : ?
YOUR ANSWER : ?

The depletion layer width of Junction

Is independent of applied voltage

Increases with heavy doping

Is increased under reverse bias

Decreases with light doping

TRUE ANSWER : ?
YOUR ANSWER : ?

Which variety of copper has the best conductivity?

Pure annealed copper

Induction hardened copper

Hard drawn copper

Copper containing traces of silicon

TRUE ANSWER : ?
YOUR ANSWER : ?

For a NPN bipolar transistor, what is the main stream of current in the base region?

Diffusion of electrons

Drift of holes

Drift of electrons

Diffusion of holes

TRUE ANSWER : ?
YOUR ANSWER : ?

For a P-N diode, the number of minority carriers crossing the junction depends on

Forward bias voltage

None of these

Rate of thermal generation of electron hole pairs

Potential barrier

TRUE ANSWER : ?
YOUR ANSWER : ?

↑