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Byju's Answer
Standard XII
Physics
V-I Characteristics for a P-N Junction Diode
The V- I c...
Question
The
V
-
I
characteristic of a silicon diode is shown in the figure. Calculate the resistance of the diode at
(a)
I
D
=
15
m
A
and
(b)
V
D
=
−
10
V
.
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Solution
We know that,
Resistance of diode is given vy
△
V
△
I
So, at
I
V
=
15
m
A
From
V
−
I
characteristic equation:
R
=
(
0.8
−
0.7
)
V
(
20
−
10
)
m
A
=
10
Ω
And,at
V
n
=
−
10
V
△
I
=
0
So,
R
is infinite.
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