There is a frill of $20$ bulbs connected in series in a room. One bulb gets fused. The remaining $19$ are again joined in series and connected to the same supply. Will the light increase or decrease in the room ?
There is a frill of $20$ bulbs connected in series in a room. One bulb gets fused. The remaining $19$ are again joined in series and connected to the same supply. Will the light increase or decrease in the room ?
The light will increase. If the voltage remains same, then the power available to the frill is $P=\frac{V^{2}}{R},$ where $R$ is the resistance of the frill. When one bulb is removed, the resistance of the frill decreases and hence the power output will increase.
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