Calculate the current drawn by primary coil of a transformer connected

1.	Calculate the current drawn by primary coil of a transformer connected to 220 volt AC. it gives output of 20 volt. if this is used to operate a device of resistance 20 ohm.
Answer» ANSWER: Here VP=200V,VS=20,RS=20Ω, EFFICIENCY (η)=80% IS=VSRS=2010=1A Efficiency η=VSISVPIP or 80100=200×1200×Ip [∵=Power outputPower INPUT] or IP=0.125A

Calculate the current drawn by primary coil of a transformer connected to 220 volt AC. it gives output of 20 volt. if this is used to operate a device of resistance 20 ohm.

Answer»

ANSWER:

Here VP=200V,VS=20,RS=20Ω, EFFICIENCY (η)=80%

IS=VSRS=2010=1A

Efficiency η=VSISVPIP or 80100=200×1200×Ip

[∵=Power outputPower INPUT]

or IP=0.125A

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Calculate the current drawn by primary coil of a transformer connected to 220 volt AC. it gives output of 20 volt. if this is used to operate a device of resistance 20 ohm.​

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Calculate the current drawn by primary coil of a transformer connected to 220 volt AC. it gives output of 20 volt. if this is used to operate a device of resistance 20 ohm.