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

Physics 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.

  • 0.625A checkmark
  • 1.600A
  • 2.500A
  • 6.250A

The correct answer is: A

Explanation

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