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When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply,

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When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be

(a) 60 watt

(b) 180 watt

(c) 10 watt

(d) 20 watt

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1 Answer

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Best answer

Correct option  (d) 20 watt

Explanation:

The resistance of each bulb

When three bulbs are connected in series their resultant resistance 

= 3 x (200)2/60

Thus power drawn by bulb when connected across 200 V supply

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