The magnitude of the electric and magnetic fields in an electromagnetic wave are related as:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → $B_0=E_0/C$
In an electromagnetic wave, the electric field $E$ and the magnetic field $B$ are related by:
$\frac{E}{B} = c$
where $c$ is the speed of light in vacuum.
Thus,
$E = cB$
or equivalently,
$B = \frac{E}{c}$
Relation: $E = cB$