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Sketch block diagram of D.C. regulated power supply. State functions of each block.

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Diagram : 


Functions of each block:  

1) Transformer: It Converts an AC input source to AC required output without changing frequency. The transformer is step up or step down transformer. 

2) Rectifier: It is a circuit which is used to convert AC into pulsating DC. A rectifying diode is used. 

3) Filter: It is a circuit used to convert pulsating DC into pure DC. A inductor and capacitors are used as filter 

4) Voltage regulator: An unregulated DC voltage is converted into regulated DC voltage. IC 78XX & 79XX series are used as regulator.

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