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Two bulbs when connected in parallel to a source take 60W each, the power consumed,

Two bulbs when connected in parallel to a source take 60W each, the power consumed, when they are connected in series with the same source is

Options

(a) 15W
(b) 30W
(c) 60W
(d) 120W

Correct Answer:

30W

Explanation:

In series, P = P₁P₂ / P₁+P₂
Given: P₁ = P₂ = 60
Therefore, Power P = (60 × 60) / (60 × 60) = 30 W.

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