Diodes & Transistor Quiz

What happens when a diode is forward biased?

• The diode becomes a conductor and allows the current to flow

• The diode becomes an insulator and the current doesn’t flow

• The diode emits visible light

• The diode produces coherent light

What happens when a diode is reverse biased?

• The diode becomes a conductor and allows the current to flow

• The diode becomes an insulator and the current doesn’t flow

• The diode emits visible light

• The diode produces coherent light

What is the purpose of a rectifier diode?

• To change Alternating Current (AC) to Direct Current (DC)

• To recover audio from a radio signal

• To conduct damaging high voltages away from sensitive electronic devices

• To produce Microwave RF signal

It is formed by introducing a thin region of N-type material between two regions of P-type material.

• PNP

• NPN

• PPNN

• NNPP

What is the function of a crystal diode in radio demodulation?

• To change Alternating Current (AC) to Direct Current (DC)

• To recover audio from a radio signal

• To conduct damaging high voltages away from sensitive electronic devices

• To produce Microwave RF signal

What is the purpose of a varicap/varactor diode?

• To change Alternating Current (AC) to Direct Current (DC)

• To recover audio from a radio signal

• To conduct damaging high voltages away from sensitive electronic devices

• To enable tunable oscillators in radios

What is the function of a zener diode?

• To change Alternating Current (AC) to Direct Current (DC)

• To recover audio from a radio signal

• To conduct damaging high voltages away from sensitive electronic devices

• To withstand current that flows when the peak inverse voltage is reached or exceeded

The three pins of FET are:

• Collector, Emitter, Base

• Source, Drain, Gate

• Collector, Emitter, Gate

• Emitter, Drain, Gate

A small input current and a positive voltage applied @ its base (with VB>VE) allows a large current to flow from collector to emitter.

• PNP

• NPN

• NNPP

• NPNN

What is the purpose of a tunnel diode?

• To change Alternating Current (AC) to Direct Current (DC)

• To recover audio from a radio signal

• To conduct damaging high voltages away from sensitive electronic devices

• To amplify signals and operate in high radiation environments