A transformer has an efficiency of 92.5%. the ratio number of turns in the primary coil to that in the secondary coil is 128 : 45. If the current passing through the secondary coil is 9.0A, calculate the current passing through the primary-coil.
2.93A
3.16A
3.42A
25.60A
27.68A
Correct answer is C
No explanation has been provided for this answer.