where 
is
reverse saturation current. V is the voltage across the diode and is positive
for forward bias and negative for reverse bias, and I is the current through
the diode, 
is the
Boltzmann constant 
and T is the
absolute temperature. If for a given diode 
A and T = 300
K, then
(a) What
will be the forward current at forward voltage of 0-6 V ?
(b)
What will be the increase in current if voltage across diode is increased to 0.7
V ?
(c) What
is the dynamic resistance ?
(d) What
will be the current if reverse bias voltage changes from 1 V to 2 V ?
Answer:
Statement of the given question is incorrect.
The relation should be
(a) 
Here
Then
(b) Now the
value of 
i.e. 
Then
(c) 
i.e.
(d) In
reverse bias V becomes negative in the relation so for 1 V or2 V reverse voltage
the current I will be equal to 
thereby giving,
i.e. infinite
dynamic resistance.
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