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AP EAMCET202315 May 2023Morning ShiftPhysicsAlternating CurrentActual

The average power output of a point source of an electromagnetic radiation is 1080 ~W . The maximum value of the rms value of the electric field at a distance of 3 ~m from the source is

Options

  1. A20 Vm ⁻¹
  2. B40 Vm ⁻¹
  3. C60 Vm ⁻¹
  4. D90 Vm ⁻¹

Correct answer

C. 60 Vm ⁻¹

Step-by-step solution

aligned & Maximum emf, ₀= P 2 R ^2 E ₀ c & = 1080 2 3.14 3^2 8.85 10⁻¹² 3 10^8 & = 1080 10^8 54 314 885 =84.85 & _ rms = ₀ 2 = 84.85 1.414 60 Vm ⁻¹ aligned

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