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A full wave rectifier uses load resistor of 1500Ω. Assume the diodes have Rf=10Ω, Rr=∞. The voltage applied to diode is 30V with a frequency of 50Hz. Calculate the AC power input.

A full wave rectifier uses load resistor of 1500Ω. Assume the diodes have Rf=10Ω, Rr=∞. The voltage applied to diode is 30V with a frequency of 50Hz. Calculate the AC power input. Correct Answer 275.2mW

The AC power input PIN=IRMS2(RF+Rr). IRMS=Im/√2=Vm/(Rf+RL)√2=30/(1500+10)*1.414=13.5mA So, PIN=(13.5*10-3)2*(1500+10)=275.2mW.

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