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.	0.88
B.	0.9
C.	0.92
D.	0.95
Answer» C. 0.92

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