Semiconductor Devices Quiz

Which special type of diode is capable of both amplification and oscillation?

• Point contact diode

• Zener diode

• Junction diode

• Tunnel diode

A thyristor (SCR) is a:

• 4 layer, 3 terminal, 4 junction device

• 4 layer, 3 terminal, 3 junction device

• 3 layer, 4 terminal, 3 junction device

• 3 layer, 3 terminal, 3 junction device

In a NPN type Bi-polar junction transistor:

• Collector current = Base current + Emitter current

• Base current = Emitter current + Collector current

• Emitter current + Base current = 0

• Emitter current = Base current + Collector current

A zener diode normally operates at:

• Reverse bias providing constant current

• Reverse bias providing constant voltage

• Forward bias providing constant current

• Forward bias providing constant voltage

During forward bias and reverse bias, an ideal diode has ___________ respectively.

• Infinite conductance & zero resistance

• Zero conductance & zero resistance

• Zero conductance & infinite resistance

• Infinite conductance & infinite resistance

The barrier potential for silicon diode at forward bias is:

• 1.1 volt

• 0.7 volt

• 0.3 volt

• 0.5 volt

A semiconductor in its purest form is known as _______

• Insulator

• Intrinsic semiconductor

• Extrinsic semiconductor

• Super conductor

In a Zener diode:

• Forward voltage rating is high

• Sharp breakdown occurs at low reverse voltage

• Negative resistance characteristics exists

• None of the above

Acceptor impurities form _______.

• c-type

• p-type

• n-type

• d-type

What is the primary function of a diode?

• To store electrical energy

• To amplify signals

• To allow current to flow in one direction

• To convert AC to DC