3
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.
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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Solution
The correct option is A (b) and (c) are correct
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.
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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