Physics · 2014
JEE Main · 12 April 2014, Shift 1 · Q22
A lamp emits monochromatic green light uniformly in all directions. The lamp is 3% efficient in converting electrical power to electromagnetic waves…
A lamp emits monochromatic green light uniformly in all directions. The lamp is $\displaystyle 3$% efficient in converting electrical power to electromagnetic waves and consumes $\displaystyle 100$ W of power. The amplitude of the electric field associated with the electromagnetic radiation at a distance of $\displaystyle 5$ m from the lamp will be nearly :
Official answer
(2)
2.$\displaystyle 68$ V/m
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JEE Main 2014 Physics question, with the answer from NTA’s final answer key. Where our answers come from.