JEE Mains · Physics · STD 12 - 8. Electromagnetic waves
During the propagation of electromagnetic waves in a medium
- A Electric energy density is half of the magnetic energy density
- B Electric energy density is equal to the magnetic energy density
- C Both electric and magnetic energy densities are zero
- D Electric energy density is double of the magnetic energy density
Answer & Solution
Correct Answer
(B) Electric energy density is equal to the magnetic energy density
Step-by-step Solution
Detailed explanation
\(E_{0}=\mathrm{CB}_{0}\) and \(C=\frac{1}{\sqrt{\mu_{0} \varepsilon_{0}}}\) Electric energy density \(=\frac{1}{2} \varepsilon_{0} E_{0}^{2}=\mu_{E}\) Magnetic energy density \(=\frac{1}{2} \frac{B o^{2}}{\mu_{0}}=\mu_{B}\) Thus, \(\mu_{\mathrm{E}}=\mu_{B}\) Energy is equally…
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