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arl146

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## Homework Statement

An electromagnetic wave from a wire antenna travels (from the reader) toward the plane of the paper. At time t = 0.0 s it strikes the paper at normal incidence. At point O and t = 0.0 s, the magnetic field vector has its maximum value, 5.01E-8 T, pointing in the negative y-direction. The frequency of this wave is 2.86E6 Hz.

(i.) What is the x-component of the associated electric field E at time t = 0.0 s? (Use the right-hand rule to determine the direction of E, and hence the sign of the x-component.)

Answer is: 15 V/m

(ii.) What is the magnitude of the Poynting vector of the wave at time t = 0.0 s?

Answer is: .599 W/m^2

(iii.) What is the y component of the magnetic field at point O at time 1.75×10-7 s?

*HELP!

## Homework Equations

B=B(max)*sin(kx-wt)

## The Attempt at a Solution

Tried to kind x and k and w from equations like T=1/f