(a)
The resistance for small reverse-bias voltages.
(a)
Answer to Problem 54P
The resistance for small reverse-bias voltages is
Explanation of Solution
Given:
The saturation current is
The value of
Formula used:
The expression for Ohm’s Law is
Here,
The expression for current in semiconductor is,
Calculation:
For small reverse-bias voltages i.e
The expression for current in semiconductor is then reduced to,
The expression for Ohm’s Law is then derived as,
The resistance is further calculated as,
Conclusion:
Therefore, the resistance for small reverse-bias voltages is
(b)
The resistance for reverse bias of
(b)
Answer to Problem 54P
The resistance for reverse bias of
Explanation of Solution
Formula used:
The resistance for reverse bias of
Calculation:
Evaluating the term
The resistance for reverse bias of
Conclusion:
Therefore, the resistance for reverse bias of
(c)
The resistance for a
(c)
Answer to Problem 54P
The resistance for forward bias of
Explanation of Solution
Formula used:
The resistance for forward bias of
Calculation:
Evaluating the term
The resistance for reverse bias of
Current is calculated from Ohm’s Law,
Conclusion:
Therefore, the resistance for forward bias of
(d)
The AC resistance for a
(d)
Answer to Problem 54P
The AC resistance for forward bias of
Explanation of Solution
Formula used:
The resistance for forward bias of
The AC resistance is expressed as,
Calculation:
The AC resistance is calculated as,
The calculation is further simplified as
Conclusion:
Therefore, the AC resistance for forward bias of
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Chapter 38 Solutions
Physics for Scientists and Engineers
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