A transformer is designed to convert the voltage from 240 V a.c mains – McqOptions

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1.	A transformer is designed to convert the voltage from 240 V a.c mains to 12 V, and has 4000 turns on its primary coil. If it is 100% efficient, and the current in the secondary coil was 0.4 A then the current in the primary coil should be
A.	0.08 A
B.	0.05 A
C.	0.02 A
D.	0.01 A
Answer» D. 0.01 A

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