Concept explainers
If diodes and transistors obey Ohm’s law.
Answer to Problem 18Q
Solution:
No, they don’t.
Explanation of Solution
Diodes and transistors do not obey Ohm’s law. The devices which obeys Ohm’s have a constant resistance and therefore has linear relationship between voltage and current. In the case of diodes the voltage-current relationship is not linear. When we operate the diodes in reverse bias, the resistance of a diode is very large. For the same diode as it is operated in a forward-bias mode has a much smaller resistance. Since a transistor can be thought of as made up of diodes, transistors also does not obey Ohm’s law.
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