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  4. An electric fan and a heater are marked as 100 W , 220 V and 1000 W , 220 V respectively. The resistance of heater is

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Q. An electric fan and a heater are marked as $100 \, W , 220\, V$ and $1000 \,W , 220\, V$ respectively. The resistance of heater is

Current Electricity

Solution:

As $R \propto V^2 / P$ or $R \propto 1 / P$, so resistance of heater is less than that of fan.