Question

An electromagnetic wave has energy in the form of

• A. variable electric field
• B. variable magnetic field
• C. both A and B
• D. none of the above

Answer 1

The correct option is C both A and B

For electromagnetic force, energy is given by:-

$E=\frac{1}{2}{ϵ}_o{E}^2=\frac{B^2}{2{\mu }_o}$

Hence, energy exist in form of variable magnetic and electric field.

Answer-(C)