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Class 12
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Zener Diode
Zener Diode
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1)
The value of reverse current after the zener breakdown is called?
Forward current
Zener current
Direct current
Reverse current
2)
A junction diode which can operate in the reverse breakdown voltage region is called?
Zener diode
Tunnel diode
Varactor diode
Schottky diode
3)
Which of these is the best description of a Zener diode?
It is a constant voltage device.
It is a constant electric current device.
It works in the forward region.
It is a rectifier diode.
4)
What is true about the breakdown voltage in a Zener diode?
It is approximately constant.
It decreases when electric current increases.
It equals the electric current times the resistance.
It destroys the diode.
5)
The load voltage is approximately constant when a Zener diode is _______.
forward biased.
unbiased.
reverse biased.
operating in breakdown region.
6)
If the load resistance increases in a Zener regulator, the Zener current _______.
increases.
decreases.
stays the same.
equals the source voltage divided by series resistance.
7)
A Zener diode is based on the principle of:
Tunneling of charge carriers across the junction.
None of the above.
Diffusion of charge carriers across the junction.
Thermionic emission.
8)
Zener diodes are:
Lightly doped p–n junctions.
None of the above.
Specially doped p–n junctions.
Normally doped p–n junctions.
9)
Which one of the following materials is usually used to make a Zener diode:
Carbon
Magnesium
Sodium
Silicon