An air-cored transformer is assumed to be 100% efficient. The ratio of the secondary turns to the primary turns is 1:20. A 240v ac supply is connected to the primary coil and a 6ohms load is connected to the secondary coil. what is the current in the primary coil
a) 0.10A
b) 0.14A
c) 2.0A
d) 40.0A
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