Ts Eamcet
Electromagnetic Waves
TS EAMCET 2020 (Online) 14th September Evening Shift
MCQ+1 / -02020
The radiation energy emitted per second by a point source is 100 W . If the efficiency of the source is $4 \%$, then the rms value of the electric field at distance of 2 m is [use $\frac{1}{4 \pi \varepsilon_0}=9 \times 10^9$ in SI unit]