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Electromagnetic Waves question

2023 · 30 Jan · Shift 2 · Q54
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  5. /2023 · 30 Jan · Shift 2 · Q54

Electromagnetic Waves question

2023 · 30 Jan · Shift 2 · Q54

JEE MainPhysicsElectromagnetic WavesMCQ+4 / −1
A point source of 100 W100 \mathrm{~W}100 W emits light with 5%5 \%5% efficiency. At a distance of 5 m5 \mathrm{~m}5 m from the source, the intensity produced by the electric field component is:
  1. A
    140πWm2\frac{1}{40 \pi} \frac{W}{m^2}40π1​m2W​
  2. B
    110πWm2\frac{1}{10 \pi} \frac{W}{m^2}10π1​m2W​
  3. C
    120πWm2\frac{1}{20 \pi} \frac{W}{m^2}20π1​m2W​
  4. D
    12πWm2\frac{1}{2 \pi} \frac{W}{m^2}2π1​m2W​
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