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Physics Electromagnetic Wave General MCQ (Single Correct)

A point source of electromagnetic radiation has an average power output of 800W. The maximum value of electric field at a distance 4.0 m from the source is

A
64.7 V/m
B
57.8 V/m
C
56.72 V/m
D
54.77 V/m

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Text Solution

Verified by Experts
The correct answer is:
D

Sol. Intensity of electromagnetic wave is

I =

or E 0 =

= = 54.77 V/m

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