[" The secondary coil of an ideal step down transformer is delivering "500" watt power at "],[12.5" A current.If the ratio of turns in the primary to the secondary is "5:1," then the "],[" current flowing in the primary coil will be: "]

The ratio of the turns in the primary and secondary coils of transformer is1: 9. The ratio of the current in the primary to secondary is

Turn ratio of a step-up transformer is 1 : 25. If current in load coil is 2A, then the current in primary coil will be :

A step down transformer is used at 220 V to provide a current of 0.5 A to a 15 W bulb. If the secondary has 20 turns, find the number of turns in primary coil has current that flows in primary coil.

A transformer is active between the voltage 230V. If the turn ratio of coils in primary and secondary coil 1:10 then what is the current is primary coil if the secondary coil has current 2A?

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 current in the primary coil is