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Two electric lamps are rated as 220V. 40...

Two electric lamps are rated as 220V. 40 W and 220V,60W. Find the heat generated per second in lamp when they are connected in series across 220V mains. Given 1 cal=4.2J.

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To solve the problem of finding the heat generated per second in two electric lamps connected in series across a 220V mains, we can follow these steps: ### Step 1: Determine the Resistance of Each Lamp The resistance \( R \) of each lamp can be calculated using the formula: \[ R = \frac{V^2}{P} ...
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