The magnetic field in a plane electromagnetic wave is given by
`B_(y) = 2 xx 10^(-7) sin (0.5 xx 10^(3)x + 1.5 xx 10^(11) t)`.
This electromagnetic wave is

Explanation

`E_(0)= cB_(0)=(3 xx 10^(8))xx(3 x 10) = 90 V//m`
`therefore` `E_(2)=E_(0)"sin" (2pi)/(lambda)(x+ vt)`
`therefore` `E_(z)=90sin(0.314xx10^(3)xx3.14xx10^(11)t)V//m`