A point source of 100 W emits light with 5% efficiency. At a dist… | JEE Main 2023 Physics PYQ

MCQEasyJEE Main 2023 · 30 January, Shift 2Characteristics of EM Waves

A point source of $100 \, \text{W}$ emits light with $5\%$ efficiency. At a distance of $5 \, \text{m}$ from the source, the intensity produced by the electric field component is:

A
$\frac{1}{2\pi} \, \text{W/m}^2$
B
$\frac{1}{40\pi} \, \text{W/m}^2$
C
$\frac{1}{10\pi} \, \text{W/m}^2$
D
$\frac{1}{20\pi} \, \text{W/m}^2$

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