Quiz 1_COE67-211

On a physical diode component, how is the cathode typically identified?

• By a stripe mark

• It is the longer of the two leads

• By a red dot

• It is the thicker of the two leads

What is the process called where electrons move from an area of high concentration to an area of lower concentration?

• Depletion

• Bias

• Rectification

• Diffusion

The depletion region in a PN junction is formed because...

• of the application of an external voltage.

• electrons and holes combine and cancel their net charges at the junction.

• the effect of temperature on the semiconductor.

• the movement of the entire P-type material.

For a diode to become forward-biased, the voltage across it must be...

• exactly zero volts.

• less than the diode's threshold voltage.

• greater than the diode's threshold voltage.

• equal to the breakdown voltage.

Which of the following polarity arrangements describes a reverse-biased condition?

• The P-type material is more positive than the N-type.

• The P-type material is more negative than the N-type.

• The anode and cathode are at the same potential.

• Current flows freely through the junction.

According to the practical diode's I-V characteristic curve, the Breakdown Region occurs when...

• v > 0

• v < -Vzk

• -Vzk < v < 0

• v = 0.7 V

Which specialized type of diode is designed to emit light when forward-biased?

• Zener Diode

• Photodiode

• Schottky Diode

• Light Emitting Diode

In the block diagram of a typical power supply, what component immediately follows the Rectifier stage?

• Transformer

• Regulator

• Filter

• AC Source

Besides the bridge type, what is the other full-wave rectifier configuration shown in the presentation?

• A single diode with a capacitor

• A transformer with a center-tapped secondary winding

• A Zener diode and a resistor

• A voltage multiplier

What is the main function of a voltage multiplier circuit?

• To produce a DC output voltage that is greater than the AC input voltage

• To regulate the output voltage to a constant level

• To convert DC back into AC

• To limit the current flowing through the circuit