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A bulb is rated \((100\mathrm{W},110\mathrm{V})\). It is operated by current of 1.0 A supplied by a step down transforme…

Q1

A bulb is rated \((100\mathrm{W},110\mathrm{V})\). 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 :

a

\(\frac{1}{2}\mathrm{A}\)

b

\(\frac{3}{8}\mathrm{A}\)

c

\(\frac{5}{9}\mathrm{A}\)

d

\(\frac{4}{7}\mathrm{A}\)

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