The magnetic field of a plane electromagnetic
wave is given by :
$\overline B = {B_0}\widehat i\left[ {\cos (kz - \omega t)} \right] + {B_i}\widehat j\cos (kz + \omega t)$
B₀ = 3 × 10^–5 T and B1 = 2 × 10^–6 T.
The rms
value of the force experienced by a stationary
charge Q = 10^–4 C at z = 0 is closest to :