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Two bulbs when connected in parallel to a source take 100 W each. The total power consumed when they are connected in series with the same source is

a)

25 W

b)

50 W

c)

100 W

d)

200 W



Question ID - 150408 | SaraNextGen Top Answer

Two bulbs when connected in parallel to a source take 100 W each. The total power consumed when they are connected in series with the same source is

a)

25 W

b)

50 W

c)

100 W

d)

200 W

1 Answer
127 votes
Answer Key / Explanation : (b) -

(b)

Let  be the resistance of each bulb.

We have

or

When the bulbs are connected in series, the voltage across each of them is . Hence, the total power consumed is

50 W

127 votes


127