Question

What is the electric field amplitude of an electromagnetic wave whose magnetic field amplitude is 7.9 mT ?

Answer 1

Given:

The amplitude of the magnetic field of the electromagnetic wave is,

`B_0=7.9\text{ mT}`

To find:

The amplitude of the electric field

Step-by-step explanation:

Let, the amplitude of the electric field is

`E_0`

As we know,

`\begin{gathered} (E_0)/(B_0)=c \\ c=3*10^8\text{ m/s} \end{gathered}`

Substituting the values we get,

`\begin{gathered} (E_0)/(7.9*10^(-3))=3*10^8 \\ E_0=3*10^8*7.9*10^(-3) \\ E_0=2.37*10^6\text{ N/C} \end{gathered}`

Hence, the amplitude of the electric field is,

`2.37*10^6\text{ N/C}`