Calculate the root mean square value of electric field produced by the radiation from 100 W bulb at a distance 1 m. Assume bulb as point source and its efficiency is 2%.

Explanation

To calculate the root mean square (RMS) value of the electric field produced by the radiation from a 100 W bulb at a distance of 1 m, we can follow these steps:

### Step 1: Determine the Effective Power
Given that the bulb has an efficiency of 2%, we first calculate the effective power that contributes to the electromagnetic radiation.

\[ P_{\text{effective}} = \text{Efficiency} \times P = 0.02 \times 100 \, \text{W} = 2 \, \text{W} \]
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