Question on: JAMB Physics - 1998
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
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Correct Option: A
Efficiency = (\frac{I_sV_s}{I_pV_p}) x 100
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