A choke coil is preferred to a resistance for reducing current in an ac circuit because .A. choke coil is cheapB. there is no wastage of powerC. choke is compact in sizeD. choke is a good absorber of heat

A choke coil is preferred to a resistance for reducing current in an a

1.	A choke coil is preferred to a resistance for reducing current in an ac circuit because .A. choke coil is cheapB. there is no wastage of powerC. choke is compact in sizeD. choke is a good absorber of heat
Answer» Correct Answer - B In an AC circuit , the coil of high inductance and negligible resistance used to control current, is called the choke coil . The power factor of such a coil is given by cos `phi` = R/`sqrt R^(2) + omega^(2)L^(2) ` `approx` R `omega`L (as R ltlt `omega`L)

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A choke coil is preferred to a resistance for reducing current in an ac circuit because .A. choke coil is cheapB. there is no wastage of powerC. choke is compact in sizeD. choke is a good absorber of heat

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