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 |
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a) |
Increase |
b) |
Decrease |
c) |
Remain the same |
d) |
Not continuous |
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 |
|||||||
a) |
Increase |
b) |
Decrease |
c) |
Remain the same |
d) |
Not continuous |
(a) From Joule’s law, the heat produced is given by Where is potential and the resistance. When one bulb is fused, the total resistance of the circuit decreases. Hence, illumination increases. |