A) rectifier
B) oscillator
C) amplifier
D) modulator.
Correct Answer: A
Solution :
Diode is a device which allows to pass a current only when it is forward baised. Thats why if we use one alternating voltage (Forward bias of diode) source instead of a battery, during the negative cycles the diode will be reverse biased and will not allow the current to flow. Hence it can be used as a rectifier.
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