Question

In an electromagnetic wave, the electric field oscillates sinusoidally with amplitude `48 Vm^(-1)`, the RMS value of oscillating magnetic field will be nearly equal to :
A. `1.6 xx 10^(-8) T`
B. `16 xx 10^(-9) T`
C. `144 xx 10^(8) T`
D. `11.3 xx 10^(-8) T`

Answer 1

Correct Answer - D
`B_(0)=(E_(0))/(c)=(48)/(3xx10^(8))=16 xx10^(-8)T`
`B_("rms") =(B_(0))/(sqrt(2))=(16 xx10^(-8))/(sqrt(2))=8 sqrt(2) xx 10^(-8) T`.