Semiconductor Devices Quiz

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

• Point contact diode

• Tunnel diode

• Zener diode

• Junction diode

A thyristor (SCR) is a :

• 4 layer, 3 terminal, 4 junction device

• 4 layer, 3 terminal, 3 junction device

• 3 layer, 3 terminal, 3 junction device

• 3 layer, 4 terminal, 3 junction device

In a NPN type Bi-polar junction transistor :

• Emitter current + Base current = 0

• Emitter current = Base current + Collector current

• Base current = Emitter current + Collector current

• Collector current = Base current + Emitter current

A zener diode normally operates at :

• reverse bias providing constant voltage

• forward bias providing constant current

• reverse 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

• infinite conductance & infinite resistance

• zero conductance & infinite resistance

A semiconductor in its purest form is known as _______

• Super conductor

• Insulator

• Intrinsic semiconductor

• Extrinsic semiconductor

Which type of diode is shown in the following picture?

• PN junction diode

• Pin diode

• Photo diode

• Tunnel diode

The barrier potential for silicon diode at forward bias is

• 0.3 volt

• 1.1 volt

• 0.7 volt

• 0.5 volt

What is the function of the base in a NPN type Bi-polar junction transistor?

• To control the flow of current between the emitter and collector

• To provide mechanical support to the transistor

• To dissipate heat generated during operation

• To amplify the input signal

What is the typical efficiency range of a solar cell?

• 10-20%

• 30-40%

• 50-60%

• 70-80%