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A lamp emits monochromatic green light u...

A lamp emits monochromatic green light uniformly in all directions. The lamp is `3%` efficient in converting electrical power to electromagnetic waves and consumes `100 W` of power. The amplitude of the electric field associated with the electromagnetic radiation at a distance of `5` m from the lamp will be:

A

1.34 V/m

B

2.68 V/m

C

4.02 V/m

D

5.36 V/m

Text Solution

Verified by Experts

The correct Answer is:
B
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DISHA PUBLICATION-ELECTROMAGNETIC WAVES-Exercise - 2 : Concept Applicator
  1. In which one of the following regions of the electromagnetic spectrum ...

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  2. Match List I (Wavelength range of electromagnetic spectrum) with List ...

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  3. A point source of electromagnetic radiation has an average power outpu...

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  4. A lamp emits monochromatic green light uniformly in all directions. Th...

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  5. In a plane electromagnetic wave propagating in space has an electric f...

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  6. If epsi(0) and mu(0) are respectively, the electric permittivity and t...

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  7. A wave is propagating in a medium of electric dielectric constant 2 ...

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  8. The decreasing order of wavelength of infrared, microwave, ultraviolet...

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  9. The ratio of amplitude of magnetic field to the amplitude of electric ...

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  10. An electromagnetic wave in vacuum has the electric and magnetic field ...

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  11. Light with an enargy flux of 25xx10^(4) Wm^(-2) falls on a perfectly r...

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  12. A point source of electromagnetic radiation has an average power outpu...

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  13. An electromagnetic wave with frequency omega and wavelength lambda tra...

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  14. The pressure exerted by an electromagnetic wave of intensity l ("watt/...

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  15. Find the energy contained in a cyllinder of cross - section 10cm^(2) a...

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  16. Radio wave diffract around building although light waves do not. The r...

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  17. Which of the following wave can not be produced by charges acceleratin...

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  18. Intensity of electromagnetic wave will be

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  19. The conduction current is the same as displacement current when the so...

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  20. Given below is a list of E.M. spectrum and its use. Which one does not...

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