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A step-down transformer is connected to main supply `200V` to operate a `6V`, `30W` bulb. The current in primary is

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A step-down transformer is connected to main supply `200V` to operate a `6V`, `30W` bulb. The current in primary is
A. 3A
B. `1.5 A`
C. `0.3A`
D. `0.15 A`
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Correct Answer - D
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