The overall efficiency of a transformer is `90%`.The transformer is rated for an output of `9000` watt.The primary voltage is `1000` volt.The ratio of turns in the primary to the secondary coil is `5:1`.The iron losses at full load are `700` watt.The primary coil has a resistance of `1 ohm`. In the above, the copper loss in the primary coil isA. `100` wattB. `700` wattC. `200` wattD. `1000` watt

The overall efficiency of a transformer is `90%`.The transformer is ra

1.	The overall efficiency of a transformer is `90%`.The transformer is rated for an output of `9000` watt.The primary voltage is `1000` volt.The ratio of turns in the primary to the secondary coil is `5:1`.The iron losses at full load are `700` watt.The primary coil has a resistance of `1 ohm`. In the above, the copper loss in the primary coil isA. `100` wattB. `700` wattC. `200` wattD. `1000` watt
Answer» Correct Answer - A Cu losses in first coil `=I_(1)^(2)R_(1)=(10)^(2)xx1=100` `=E_(1)I_(1)-E_(2)I_(2)` `=10,000-9000` `=1000`

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