Fewpal
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in Electromagnetic induction and alternating currents by (31 points)

Assume that a lamp radiate power P uniformly in all directions. What is the magnitude of electric field strength at a distance r from the lamp??

 This is a question from electromagnetic waves physics class 12smiley

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1 Answer

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by (51.2k points)

I = \(\frac{1}{2}\)\(\epsilon_0 \epsilon^2_0\)

I =  \(\frac{P}{AC}\)

\(\frac{P}{C\times4\pi R^2}\) = \(\frac{1}{2}\)\(\epsilon_0 \epsilon^2_0\)

\(\epsilon^2_0\) = \(\frac{P}{2\pi \epsilon_0R^2C}\)

\(\epsilon_0 \) \(\sqrt\frac{P}{2\pi \epsilon_0 R^2 C}\)

by (31 points)
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Thank you so much

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