a
Efficiency of transformer = (secondary coil ÷ primary coil) × 100%
b
Efficiency of transformer = (mechanical advantage ÷ velocity ratio) × 100%
c
Efficiency of a transformer = (Number of turns in the secondary coil ÷ Number of turns in the primary coil) × 100%
d
Efficiency of a transformer = (power developed in the secondary coil ÷ power supplied to the primary coil) × 100%
Explanation
Correct Option
dVideo Explanation
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