A step-down transformer has a power output of 50 W and efficiency of 80%. if
PHYSICS
JAMB 2008
A step-down transformer has a power output of 50 W and efficiency of 80%. if the mains supply voltage is 200 v, calculate the primary current of the transformer.
- A) 0.31 A
- B) 3.20 A
- C) 3.40 A
- D) 5.00 A
Correct Answer: A) 0.31 A
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