(i)Rectification: The process in which an alternating current is converted into direct current, is defined as rectification.

(ii)Rectifier: The device employing diode, used to convert an alternating current into direct current, is known as rectifier.

(iii)The rectifiers are of two types:

       (a)  Half wave rectifier    (b)       Full wave rectifier

Half wave rectifier: The rectifier, in which only alternate half cycles of applied alternating signal are converted into direct current, is known as half wave rectifier.

Full wave rectifier: The rectifier is which the whole cycle of applied alternating signal is converted into direct current, is known as full wave rectifier.

(iii) Difference between half wave rectifier and full wave rectifier:


  (v)Similarities between half wave and full wave rectifiers

(a) The alternating input signal to be rectified is connected to the primary of transformer.

(b) The output voltage is obtained across the ends of load resistance.

(c) The output voltage is unidirectional but it is not constant rather pulsating.

(d) The output voltage is the mixture of alternating and direct voltages.

(e) In output, the direct components are more than the alternating components.

(f)Diode conducts only when the plate is positive with respect to the cathode. semiconductor diode conducts only when it is forward biased.

(g)When the plate of diode is negative with respect to the cathode than it does not conduct.

 

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