Electromagnetic waves: The magnitude of the magnetic field at point P for a certain electromagnetic wave is 2.12 μT. What is the magnitude of the electric field for that wave at P? (c = 3.0 × 10⁸ m/s) A) 636 N/C B) 745 N/C C) 5.23 µN/C D) 6.36 µN/C E) 7.45 µN/C

Question

Quizplus · Accepted Answer

The magnitude of the electric field (E) in an electromagnetic wave is related to the magnitude of the magnetic field (B) by the equation E = cB, where c is the speed of light (3.0 × 10^8 m/s). Substituting the given values, E = (3.0 × 10^8 m/s)(2.12 μT) = (3.0 × 10^8 m/s)(2.12 × 10^-6 T) = 636 N/C.

Electromagnetic Waves: the Magnitude of the Magnetic Field at Point