Some electric bulbs are connected in series across a 220V supply in a room. If one bulb is fused, then remaining bulbs are connected again in series across the same supply. The illumination in the room will be

Question

Dr. Abubacker · Accepted Answer

(a) From Joule’s law, the heat produced is given by
$P = \frac{V^{2}}{R}$
Where $V\ $is potential and $R$ the resistance.
When one bulb is fused, the total resistance of the circuit decreases. Hence, $(P)$ illumination increases.

Q. Some electric bulbs are connected in series across a 220V supply in a room. If one bulb is fused, then remaining bulbs are connected again in series across the same supply. The illumination in the room will be

Explanation

Reviewed by Dr. Abubacker

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