Alternating CurrentMedium
Question
A transformer transforms 220 volts to 11 volts. If the current strength in the primary coil is 5 amp. and that in the secondary, 90 amp, what is the efficiency of the transformer is -
Options
A.90%
B.100%
C.211%
D.211%
= 20
= 18
× 100 = 90%More Alternating Current Questions
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