zener diode quiz

Zener diodes are also known as

• a) Voltage regulators

• b) Forward bias diode

• c) Breakdown diode

• d) None of the mentioned

Which of the following is true about the resistance of a Zener diode?

• a) It has an incremental resistance

• b) It has dynamic resistance

• c) The value of the resistance is the inverse of the slope of the i-v characteristics of the Zener diode

• d) All of the mentioned

Which of the following is true about the temperature coefficient or TC of the Zener diode?

• a) For Zener voltage less than 5V, TC is negative

• b) For Zener voltage around 5V, TC can be made zero

• c) For higher values of Zener voltage, TC is positive

• d) All of the mentioned

In the circuit, what is the output voltage?

• a) 50 V

• b) 70 V

• c) 120 V

• d) 170 V

Which of the following is the correct symbol for the zener diode?

• 
• 
• 
• 

The depletion region of the Zener diode is ____________

• a) Thick

• b) Normal

• c) Very Thin

• d) Very thick

In the breakdown region, a zener diode behaves like a …………… source.

• constant voltage

• constant current

• constant resistance

• none of the above

The maximum efficiency of a half-wave rectifier is ………………..

• 40.6 %

• 81.2 %

• 50 %

• 25 %

A Zener diode, having breakdown voltage equal to 15 V, is used in a voltage regulator circuit shown in the figure. The current through the diode is

• 10 mA

• 15 mA

• 20 mA

• 5 mA

Depletion region behaves as

• Semiconductor

• Insulator

• Conductor

• High resistance