A room heater is rated `500 W, 220V`. (a) Find the resistance of its coil. (b) If the supply voltage drops to `200 V`, what will be the power consumed? ( c) If an electric bulb rated `100 W, 220 V` is connected in series with this heater, what will be the power consumed by the heater and by the bulb when the supply is at `220 V`?

Explanation

Let's solve the question step by step.

### Given Data:
- Power of the heater, \( P = 500 \, \text{W} \)
- Voltage of the heater, \( V = 220 \, \text{V} \)

### Part (a): Find the resistance of the heater's coil.
We know the formula for power in terms of voltage and resistance:
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