Question
Question: A semiconductor device is connected in a series circuit with a battery and a resistance. A current i...
A semiconductor device is connected in a series circuit with a battery and a resistance. A current is found to ass through the circuit. If the polarity of the battery is reversed, the current drops almost to zero. The device may be
A
A P-type semiconductor
B
An N-type semiconductor
C
A PN-junction
D
An intrinsic semiconductor
Answer
A PN-junction
Explanation
Solution
When polarity of the battery is reversed, the P-N junction becomes reverse biased so no current flows.