# Solved Problems-3

Problem-3
The electric field of a uniform plane wave propagating in the positive z-direction is given by,

where, E0 is a constant. Find (a) the corresponding magnetic field , and (b) the Poynting vector. Evaluate the Poynting vector if E0 = 10 V/m.
Solution
(a) By Maxwellâ€™s equation,
or,

Hence, the magnetic field is given as,

(b) The Poynting vector,