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Standard XII
Physics
Zener Diode as Voltage Stabilizer
Question
From the Zener diode circuit shown in figure, the current through the Zener diode is
34
m
A
31.5
m
A
36.5
m
A
2.5
m
A
A
34
m
A
B
36.5
m
A
C
2.5
m
A
D
31.5
m
A
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Solution
Verified by Toppr
The current through the load resistance,
I
1
=
V
z
e
n
e
r
R
L
o
a
d
=
50
20
×
10
3
=
2.5
×
10
−
3
A
The current through the
5
k
Ω
resistance,
I
2
=
E
−
V
z
e
n
e
r
R
=
220
−
50
5
×
10
3
=
34
×
10
−
3
A
Clearly, the Zener current,
I
z
e
n
e
r
=
I
2
−
I
1
=
(
34
−
2.5
)
×
10
−
3
A
=
31.5
m
A
Option (B) is correct.
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