Chapter 29.2, Problem 32SSC

To determine

To compare the resistance provided by $pn$ - junction when it is forward biased and when it is reverse bias.

Answer to Problem 32SSC

The resistance becomes high for a reverse bias diode and the resistance is low for a forward bias diode.

Explanation of Solution

Introduction:

The resistance is indirectly proportional to the flow of current and it depends in the polarity of the diode.

In forward bias, the resistance is low and the flow of current is high in the circuit. In the reverse bias, the resistance becomes high and so it obstructs the flow of current in the circuit. Therefore, the flow of current is small in reverse bias.

Conclusion:

Hence, the reverse bias offers more resistance as compare to forward bias.