You are given three bulbs of $25$, $40$ and $60\, watt$. Which of them has lowest resistance
A$25\, watt$ bulb
B$40\, watt$ bulb
C$60\, watt$ bulb
D
Information is insufficient
Medium
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C$60\, watt$ bulb
c (c) Because $R \propto \frac{1}{P}$
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Two identical heaters rated $220\, volt$, $1000\, watt$ are placed in series with each other across $220 \,volt$ lines. If resistance do not change with temperature, then the combined power is ............. $watt$