Questions
A transformer with efficiency 90% works at 4.5 kW and 100 V. If the secondary voltage is 200 V, then the primary and secondary currents are respectively.
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Correct option is A
Similar Questions
A 200 watt bulb is connected in secondary coil. Its primary is connected at 400 volt. If efficiency of transformer is 80% and the bulb is running with its peak power then, the current in primary coil is
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