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Question

# A Zener diode when used as a voltage regulator, is connected (a) in forward bias. (b) in reverse bias.(c) in parallel to the load.(d) in series to the load.(b) and (c) are correct(a) and (b) are correct(a) only is correct(d) only is correct

A
(a) and (b) are correct
B
(b) and (c) are correct
C
(d) only is correct
D
(a) only is correct
Solution
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#### When Zener diode is biased in the forward direction it behaves like a normal signal diode passing the current increasing linearly with voltage, but as soon as a reverse voltage applied across the Zener diode attains the breakdown voltage of the device, a large current starts to flow through the diode. Thus, for a constant voltage large current will flow through it. Hence, it always connected in parallel to the load.

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Similar Questions
Q1
A Zener diode when used as a voltage regulator, is connected
(a) in forward bias.
(b) in reverse bias.
(c) in parallel to the load.
(d) in series to the load.
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Q2
Consider the following statements (A) and (B) and identify the correct answer.

(A) A zener diode is connected in reverse bias, when used as a voltage regulator.

(B) The potential barrier of pn junction lies between 0.1 V to 0.3 V.
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Q3

How is a Zener diode fabricated? What causes the setting up of high electric field even for small reverse bias voltage across the diode?

Describe, with the help of a circuit diagram, the working of Zener diode as a voltage regulator

OR

(a) Explain with the help of a diagram, how depletion region and potential barrier are formed in a junction diode.

(b) If a small voltage is applied to a p-n junction diode, how will the barrier potential be affected when it is (i) forward biased, and (ii) reveres biased?

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Q4
In which bias can a zener diode be used as voltage regulator?
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Q5
A Zener diode having break-down voltage 5.6V is connected in reverse bias with a battery of emf 10V and a resistance of 100Ω in series. The current flowing through the Zener is
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