Manitude of the electric and magnetic field in an electromagnetic wave radiated by a `200 W` bulb at a distance 2m from it is assuming efficiency of bulb is `5%` and it behaves like a point source.

Explanation

To find the magnitude of the electric and magnetic fields in an electromagnetic wave radiated by a 200 W bulb at a distance of 2 m, we will follow these steps:

### Step 1: Calculate the Effective Power of the Bulb
The effective power of the bulb can be calculated using its efficiency. Given that the efficiency is 5%, we can find the effective power (P_eff) as follows:

\[ P_{\text{eff}} = \text{Efficiency} \times P = \frac{5}{100} \times 200 \, \text{W} = 10 \, \text{W} \]
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