Semiconductor and Diode Quiz

P-type semiconductors are formed by adding:

• Trivalent impurities

• Pentavalent impurities

• Monovalent impurities

• Divalent impurities

Which of the following is a pentavalent dopant?

• Gallium

• Boron

• Indium

• Phosphorus

The SCR conducts when:

• Anode is negative

• No voltage is applied

• Gate is triggered

• Cathode is positive

Reverse biasing a P-N junction results in:

• High current

• Breakdown

• Very small current

• Oscillation

Forward biasing reduces the:

• Depletion region

• Current

• Voltage

• Resistance

In reverse bias, the depletion layer:

• Decreases

• Remains same

• Increases

• Disappears

The diode current equation is:

• I = Io(e^V/ηVT - 1)

• I = V/R

• I = P/V

• I = VR

Which factor affects the diode biasing condition?

• Power supply

• Temperature

• Capacitance

• Inductance

Zener diode is heavily doped to:

• Increase current

• Increase reverse breakdown voltage

• Decrease breakdown voltage

• Increase resistance

Zener diode conducts in reverse bias when:

• Voltage < 0.3V

• Voltage > breakdown voltage

• Voltage = 0

• Current = 0