AP EAMCET · PHYSICS · Electromagnetic Waves
In a plane electromagnetic wave \(U_E\) and \(U_B\) are average energy densities of electric field and magnetic field respectively, then the correct option in the following is
- A \(U_E=\frac{U_B}{2}\)
- B \(U_E=2 U_B\)
- C \(U_E=U_B\)
- D \(U_E \neq U_B\)
Answer & Solution
Correct Answer
(C) \(U_E=U_B\)
Step-by-step Solution
Detailed explanation
Energy of electromagnetic wave is equally shared between electric and magnetic fields, \(U_E=U_B\). i.e, \(\frac{1}{2} \varepsilon_0 E^2=\frac{1}{2 \mu_0} B^2\)
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