Efficiency of a transformer is equal to
...Efficiency of a transformer is equal to
Efficiency of transformer = (secondary coil ÷ primary coil) × 100%
Efficiency of transformer = (mechanical advantage ÷ velocity ratio) × 100%
Efficiency of a transformer = (Number of turns in the secondary coil ÷ Number of turns in the primary coil) × 100%
Efficiency of a transformer = (power developed in the secondary coil ÷ power supplied to the primary coil) × 100%
Correct answer is D
Efficiency of a transformer = (power developed in the secondary coil ÷ power supplied to the primary coil) × 100%
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