A transformer is used to light a 100 W and 110 Vlamp from a 220 V mains. If the main current is 0.5amp, the efficiency of the transformer isapproximately [2007]
  • a)
    50%
  • b)
    90%
  • c)
    10%
  • d)
    30%.
Correct answer is option 'B'. Can you explain this answer?

Class 12 Question

Kriti Pandey answered Feb 21, 2019
Efficiency of the transformer

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