At some instant and location, the electric field associated with an electromagnetic wave in vacuum has the strength 83.9 V/m. Find the magnetic field strength B, the total energy density u, and the power flow per unit area, all at the same instant and location. B = J/m3 power flow per unit area: W/m2

A future space station in orbit about the earth is being powered by an electromagnetic beam from the earth. The beam has a cross-sectional area of 166 m2 and transmits an average power of 2.35 × 104 W. What are the rms values of the (a) electric and (b) magnetic fields?

A rocket zooms past the earth at v = 2.0 x 10 m/s. Scientists on the rocket have created the electric and magnetic fields shown in the figure.(Eigure 1) Assume that B = 1.5 T and E= 1.5x106 V/m. Figure B E 2.0 × 10 m/s 1 of 1 ▼ Part A What is the electric field strength measured by an earthbound scientist? Express your answer using two significant figures. Π ΑΣΦ E = Submit Part B Up What is the direction of the electric field measured by an earthbound scientist? Down Left B = Request Answer Right Into the page Submit Out of the page Part C Previous Answers Correct ? V/m What is the magnetic field strength measured by an earthbound scientist? Express your answer using two significant figures. ΠΨΕ ΑΣΦ ? T

A low-frequency radio wave is oscillating at a rate of 60 MHz with a peak electric field of 120 N/C. Which of the following functions is the correct excpression for the magnetic field? а. 2л B (x,t) =40µTsin -(1.2x)(10'). b. B (x,t) =0.40µTsin 2л Ос. B (x,t) =4.0µTsin 2 1.2)(10), Od. В (х,1) %3D0.40диTsin| (1.0) е. B (x,t) =0.40µTsin (1.2)