An electric bulb is rated as \( 200 \,\text{W} \). What will be the peak magnetic field at \( 4 \,\text{m} \) distance produced by the radiations coming from this bulb? Consider this bulb as a point source with \( 3.5\% \) efficiency.
\( 1.19 \times 10^{-8} \,\text{T} \)
\( 1.71 \times 10^{-8} \,\text{T} \)
\( 0.84 \times 10^{-8} \,\text{T} \)
\( 3.36 \times 10^{-8} \,\text{T} \)
