0 votes
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

Please log in or register to answer this question.

1 Answer

+2 votes
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)
reshown by
Thank you so much

Related questions

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.