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A semiconducting device is connected in ...

A semiconducting device is connected in a series circuit with a battery and a resistance. Current is found to pass through the circuit. If the polarity of the battery is reversed, the current drops to zero. The device may be

A

p-type semiconductor

B

n-type semiconductor

C

an intrinsic semiconductor

D

p-n junction

Text Solution

Verified by Experts

The correct Answer is:
D
The device is a pn junction. When a current flows across the junction, it is forward biased. On reversing, the polarity of the battery, it is reverse biased and current drops to almost zero.
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