An electromagnetic wave is traveling to the right (+x-direction). At a given loc

Question

An electromagnetic wave is traveling to the right (+x-direction). At a given location, at a given instant in time, the electric field vector is 980 N/C directed into the page (-z-direction). What is the magnitude of the magnetic field vector at this location at this time? Write your answer as a magnitude and to three significant figures.

What are all the possible directions of the magnetic field vector above? You may have one or more possible answers.

A) to the right (+x-direction)

B) to the left (-x-direction)

C) upward (+y direction)

D) downward (-y direction)

E) out of the page (+z direction)

F) into the page (-z-direction)

G) in a direction not listed above

Explanation / Answer

Electric field and m,agneyic fields are related by E = Bc

so B = E/c

B = 980/3e8

B = 3.267*10^-6 T

b. D) downward (-y direction)

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