A transformer is plugged into a 120 V rms source and has a primary cur – McqOptions

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1.	A transformer is plugged into a 120 V rms source and has a primary current of 300 mA rms. The secondary is providing 18 V across a 10 load. What is the efficiency of the transformer?
A.	88%
B.	90%
C.	92%
D.	95%
Answer» C. 92%

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