Question

A plane electromagnetic wave of frequency 25 MHz travels in free space along the x–direction. At a particular point in space and time, E = 6.3\(\hat{j}\) Vm^-1. What is B at this point?

Answer 1

As we know that (EX B) is along v and only \((\hat{j}\times\hat{k})\) gives \(\hat{i}\) . Hence B = B\(\hat{k}\)