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

Options

A. `27 xx 10^(-4)`
B. `3 xx 10^(-12)T`
C. `((1)/(3)) xx 10^(-12)T`
D. `3 xx 10^(12)` T

Answer

B

Explanation

`B= (E)/(c)= (9 xx 10^(-4))/(3 xx 10^(8))= 3 xx 10^(-12)` T