Question

In an electromagnetic wave, the electric field oscillated sinusoidally with amplitude `45 V//m^(-1)`. The RMS value of oscillating magnetic field will be:
A. `1.6xx10^(-8)` T
B. `16xx10^(-9)` T
C. `144xx10^(8)` T
D. `11.3xx10^(-8)` T

Answer 1

Correct Answer - d
`B_(0)=(E_(0))/(c)=(48)/(3xx10^(8))=16xx10^(-7) T`
`B_(ms)=(B_(0))/(sqrt(2))=(16xx10^(-8))/(sqrt(2))=8sqrt(2)xx10^(-8) T`