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Two bulbs, rated 200 V, 60 W and 200 V, 100 W, are connected in series across a 200 V supply. Find the total power consumed.

1. 37.5 watt
2. 160 watt
3. 62.5 watt
4. 110 watt

Correct answer: 37.5 watt

Solution

The resistances are 666.7 ohm and 400 ohm; in series across 200 V the total power is 37.5 W.

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