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Question

A single phase half wave rectifier with a freewheeling diode has R- L load with resistance of value R = 8 Ω and very large inductance. If source is ac supply with 240 V and 50 Hz frequency , then the rms value of source current will be_____A.
  1. 9.55

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Solution

The correct option is A 9.55
Output voltage, V0=12ππ0Vmsinωtd(ωt)=Vmπ
Output current, I0=VmπR2402π×8=13.5 A
I0,rms=13.5 A
Power in the resistor,P=I2rmsR=(13.5)2×8=1458 W
Source current,Isrms=I0rms2=13.52=9.55 A

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