A point source of electromagnetic radiation has an average power output of 800W, the maximum value of magnetic field will be:

2.09 × 10–5 T 2.09 × 10–6 T 2.09 × 10–7 T 2.09 × 10–8 T

2.09 × 10–7 T

The maximum value of magnetic field is given by $B_m=\frac{E_m}{c}=\frac{62.6}{3 \times 10^8}$ = 2.09 × 10–7 T