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VITEEE 2014 Solved Paper
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© examsnet.com
Question : 27
Total: 120
A Zener diode, having breakdown voltage equal to 15 V is used in a voltage regulator circuit shown in figure. The current through the diode is
10 mA
15 mA
20 mA
5 mA
Validate
Solution:
Voltage across zener diode is constant
(i)
1
k
Ω
=
15
V
1
k
Ω
=
15
m
A
(
i
)
250
Ω
=
(
2
0
−
1
5
)
V
2
5
0
Ω
=
5
V
2
5
0
Ω
=
2
0
1
0
0
0
A
=
2
0
m
A
∴
(
i
)
Z
e
n
e
r
=
(
20
−
15
)
=
5
m
A
© examsnet.com
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