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.
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Correct Answer: Option A
Explanation:
Efficiency = \(\frac{I_sV_s}{I_pV_p}\) x 100
Efficiency = \(\frac{I_sV_s}{I_pV_p}\) x 100