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A zener diode, having breakdown voltage ...

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

A

`20mA`

B

`5mA`

C

`10mA`

D

`15mA`

Text Solution

Verified by Experts

The correct Answer is:
B
Voltage across zener diode remains constant
`i_(0)=(15)/(10^(3))=15mA`
`i=(20-15)/(250)=(1)/(50)A=20mA`
`i_("zener")=i-i_(0)=5mA`
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