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. `27xx10^(-4)T`
B. `3xx10^(-12)T`
C. `((1)/(3))xx10^(-12)T`
D. `3xx10^(12)T`

Answer

B

Explanation

For electromagnetic waves we know that, `(E)/(B)=c`
`therefore" "(9xx10^(-4))/(B)=3xx10^(8)ms^(-1)" "B=3xx10^(-12)T`.