Question

An iron -cored transformer with 50% efficiency has ratio of the secondary turns to the primary turns is 1: 20. A 240 V ac supply is connected to primary coil and a 6 ohm resistor is connected to secondary coil what is the current in the primary coil?
A. 0.2A
B.0.1A
C.1A
D. 1.4A ​

Answer 1

Answer:

0.1 A

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