If the Electric Field in a Plane Electromagnetic Wave Is

question 66

Multiple Choice

If the electric field in a plane electromagnetic wave is along the y axis and its magnitude is given by E_m sin (kx + t) in SI units, then the magnetic field is along the z axis and its magnitude is given by:

• A)(E_m/c)cos (kx + t)
• B)-(E_m/c)cos (kx + t)
• C)(E_m/c)sin (kx + t)
• D)-(E_m/c)sin (kx + t)
• E)E_m cos (kx + t)

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