A transformer which can produce 8V from a 240v a.c. supply, has an efficiency of 80%. If the current in the secondary coil is 15A, calculate the current in the primary coil.
-
A.
0.625A -
B.
1.600A -
C.
2.500A -
D.
6.250A
Correct Answer: Option A
Explanation
Efficiency = (frac{I_sV_s}{I_pV_p}) x 100