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A zener diode having breakdown voltage e...

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

A

10 mA

B

15 mA

C

20 mA

D

5 mA

Text Solution

Verified by Experts

The correct Answer is:
D
Voltage across zener diode is constant

`(i)_(kOmega)=(15"volt")/(1kOmega)=15mA`
`(i)_(250kOmega)=((20-15)V)/(250Omega)=(5V)/(250Omega)=(20)/(1000)A=20mA`
`:. (i)_("zener diode")=(20-15)=5mA`
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