An electric bulb is rated "220 V, 100 W'.
What is its resistance ?

Explanation

To find the resistance of the electric bulb rated at "220 V, 100 W", we can use the formula that relates power (P), voltage (V), and resistance (R). The formula is:

\[ P = \frac{V^2}{R} \]

### Step-by-Step Solution:

1. **Identify the given values**:
- Voltage (V) = 220 V
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