The rms value of the electric field component of an electromagnetic wave is 27.2 N/C. What is the maximum value of the electric field?
A) 38.5 N/C
B) 19.2 N/C
C) 27.2 N/C
D) 47.4 N/C
E) 52.8 N/C

Question

Quizplus · Accepted Answer

The rms value of an electric field is related to its maximum value by the equation Erms = Emax/sqrt(2). Therefore, Emax = Erms * sqrt(2) = 27.2 N/C * sqrt(2) = 38.5 N/C.

The Rms Value of the Electric Field Component of an Electromagnetic