1.

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

A. \[64.7\text{ }V/m\]         
B. \[57.8\text{ }V/m\]
C. \[56.72\text{ }V/m\]       
D. \[54.77\text{ }V/m\]
Answer» E.


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