Question

The average electric field of electromagnetic waves in certain region of free space is `9 xx 10^(–4) NC^(–1)`. Then the average magnetic field in the same region is of the order of
A. `27 xx 10^(-4) T`
B. `3 xx 10^(-12) T`
C. `((1)/(3)) xx 10^(-12) T`
D. `3 xx 10^(12) T`

Answer 1

Correct Answer - B
Given `E = 9 xx 10^(-4) NC^(-1)`
We know that, `c = (E)/(B) rArr B = (9 xx 10^(-4))/(3 xx 10^(8)) = 3 xx 10^(-12)T`