A transformer which can produce 8V from a 240v a.c. supply, has an efficiency of...

JAMB 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 Answer: Option A

Explanation

Efficiency = \(\frac{I_sV_s}{I_pV_p}\) x 100

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A transformer which can produce 8V from a 240v a.c. supply, has an efficiency of...

Correct Answer: Option A

Explanation

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