1.

A lamp emits monochromatic green light uniformly in all directions. The lamp is 3% efficient in converting electrical power to electromagnetic waves and consumes 100W of power. The amplitude of the electric field associated with the electromagnetic radiation at a distance of 10m from the lamp will be

A.            1.34 V/m                                
B.            2.68 V/m
C.            5.36 V/m                                
D.            9.37 V/m
Answer» B.            2.68 V/m


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