Discussion
Choose the correct statement
Answer: E
The correct statement is The potential barrier in a forward biased p-n junction gets reduced.
In forward bias, the applied voltage opposes the built-in potential across the depletion layer, so the barrier falls and majority carriers can cross the junction; current flows.
The others are wrong. An intrinsic semiconductor is pure; it is an extrinsic one that has trivalent or pentavalent impurities, and so pure Ge or Si is intrinsic, not extrinsic. A semiconductor's conductivity increases with temperature, so reducing the temperature lowers it. And rectifiers are built from p-n junction diodes.
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