When two semiconductors of p-and ntype are brought in contact, they form p-n junction which acts like a/an – (1) Conductor (2) Oscillator (3) Rectifier (4) Amplifier

When two semiconductors of p-and ntype are brought in contact, they form p-n junction which acts like a/an – (1) Conductor (2) Oscillator (3) Rectifier (4) Amplifier
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(3) Rectifier Explanation: P-n junction is a device which flows current in one direction when it is forward biased and when it is reverse biased it doesn't flow any current through it. So it acts as an rectifier device to convert sinusoidal current to unidirection. A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction.
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When is a p-n junction said to be forward biased or what is meant by forward biasing of p-n junction? How does it affect resistance?

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When is a p-n junction said to be biased?

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Last Answer : When an external source of e.m.f is connected to a p-n junction, it is said to be biased.

What is a p-n junction?

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Last Answer : The junction that is obtained when a p-type semiconductor and an n-type semiconductor are kept in contact is called p-n junction.

Why gold is added to the p-n junction?

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Last Answer : Ans-To reflect heat. To reduce the recombination time.

In the reverse biased p-n junction, the current is of the order of (a) Ampere (b) Milliampere (c) Microampere (d) Nano-ampere

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