CUET · PHYSICS · PYQ PAPER 2023
A semiconductor device is connected in series circuit with a battery and resistance. A current is found to pass through the circuit. If the polarity of the battery is reversed, the current drops at almost zero. The device may be
- A A p-type semiconductor
- B An Intrinsic semiconductor
- C An n-type semiconductor
- D a p-n Junction
Answer & Solution
Correct Answer
(D) a p-n Junction
Step-by-step Solution
Detailed explanation
A p-n junction (diode) allows current to flow easily in forward bias but blocks it in reverse bias, which explains why the current drops to almost zero when the battery polarity is reversed. Pure semiconductors (like p-type, n-type, or intrinsic) act like resistors and would…
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