Two lamps rated 100 W and 40 W are connected in series to a 230 V AC supply. Which statement best describes their brightness?

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Published
25 Jun 2018
Last updated
28 May 2026

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Explanation

When two lamps with different wattages are connected in series, the lamp with the lower wattage (higher resistance) drops more voltage and therefore glows brighter. Since the 40 W lamp has higher resistance than the 100 W lamp, it will shine more brightly.

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