Zener Diode

Which of these is the best description of a zener diode?

• A rectifier

• It is a constant-voltage device.

• It is a constant-current device.

• It works in the forward region

The load voltage is approximately constant when a zener diode is

• Forward biased

• Operating in the breakdown

  region

• Reverse biased

• Unbiased

If the series resistance increases in an unloaded zener regulator, the zener current

• Decreases

• Increases

• Stays the same

• Equals the voltage divided by

  the resistance

What is the purpose of a zener diode?

• To rectify AC voltage

• To regulate voltage

• To amplify signals

• To generate high-frequency waves

How does the zener current change if the series resistance in an unloaded zener regulator increases?

• It decreases

• It increases

• It remains the same

• It becomes zero

What happens to the load voltage when a zener diode is operating in the breakdown region?

• It decreases

• It increases

• It remains constant

• It becomes zero

What is the voltage across a zener diode when it is forward biased?

• Zero

• Equal to the breakdown voltage

• Equal to the forward voltage drop

• Equal to the supply voltage

Which region of operation does a zener diode work in?

• Forward region

• Reverse region

• Breakdown region

• Active region