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(B) When an alternating voltage is applied to a $p-n$ junction diode in series with a load,the diode acts as a rectifier.During the positive half-cycl

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a pulsating voltage appears across load.

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(B) When an alternating voltage is applied to a $p-n$ junction diode in series with a load,the diode acts as a rectifier.During the positive half-cycle of the input $a.c.$ signal,the diode is forward-biased and conducts current,allowing voltage to appear across the load.During the negative half-cycle,the diode is reverse-biased and does not conduct,resulting in zero voltage across the load.Consequently,the output voltage across the load is unidirectional but varies with time,which is known as a pulsating $d.c.$ voltage.

If an alternating voltage is applied across a $p-n$ junction diode in series with a load,then:

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