A step-down transformer is connected to main supply \( 200 \mathrm{...

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A step-down transformer is connected to main supply \( 200 \mathrm{~V} \) to operate a \( 6 \mathrm{~V}, 30 \mathrm{~W} \) bulb. The current in primary is
(a) \( 3 \mathrm{~A} \)
(b) \( 1.5 \mathrm{~A} \)
W
(c) \( 0.3 \mathrm{~A} \)
(d) \( 0.15 \mathrm{~A} \)
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