A bulb is rated (100 ~W , 110 ~V ) . It is operated by current of 1.0 A supplied by a…
Physics · Class 12 · CBSE — Alternating Current
A bulb is rated \((100 {~W}, 110 {~V})\) . It is operated by current of 1.0 A supplied by a step down transformer. If the input voltage and efficiency of the transformer are 220 V and 0.9 respectively, the input current drawn from the mains is:
- \(\frac{1}{2} {~A}\)
- \(\frac{3}{8} {~A}\)
- \(\frac{5}{9} {~A}\)
- \(\frac{4}{7} {~A}\)
Answer
(C) 5 9 ~A
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