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?
In Physics
3 Answers Available
Asked by Oluwabusolami on 8th February, 2019
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