Question

Problem 1

An electromagnetic wave propagates along the +y direction. If the electric field at the origin is along the +z direction, what is the direction of the magnetic field

2

If an electromagnetic wave has components Ey = E0 sin(kx - ?t) and Bz = B0 sin(kx - ?t), in what direction is it traveling?

Answer #1

If the electric field in a plane electromagnetic wave is along
the y axis and its component is given
by Em sin(kx + ωt), in SI units, then the magnetic field is along
the z axis and its component
is given by:
A. (Em/c) cos(kx + ωt)
B. −(Em/c) cos(kx + ωt)
C. −(Em/c) sin(kx + ωt)
D. Em cos(kx + ωt)
E. (Em/c) sin(kx + ωt)
how and why b is wrong

If the magnetic field of an electromagnetic wave is in the
+-direction and the electric field of the wave is in the
+-direction, the wave is traveling in the
-x-direction.
-y-direction.
+z-direction.
xy-plane.
-z-direction.

A linearly-polarized sinusoidal electromagnetic wave propagates
in the –x direction. At a particular moment in time, the magnetic
field at point (–4, 0, 0) points in the –z direction. At that same
moment at (–4, 0, 0), what is the direction of the electric field?
Drawing a diagram should help. Group of answer choices –z direction
+z direction +y direction –y direction

A sinusoidal plane electromagnetic wave propagates in
the space in the + y direction. If the direction and amplitude (9V
/ m) of the electrical component of this wave is i, what is the
magnetic direction and amplitude? Emergency please!!

At a certain instant in time, the electric field of an
electromagnetic wave in free space points in the -z
direction, and the magnetic field points in the +y
direction. In what direction is this wave traveling?
A) +x direction ___B) -x direction ___ C)
+y direction ___D) -z direction ___E) +z
direction ___
Please explain why you chose your answer

The electric field for a sinusoidal electromagnetic wave is
E = E0
sin(ky+wt) i
with E0 =40 V/m and k = 1.40E+8
m-1.
Select the direction of propagation for this wave.
Find the wave number of the wave.
Find the wavelength of the wave.
Find the period of the wave.
Find the frequency of the wave.
Find the angular frequency of the wave.
Find the speed of the wave.
Find the amplitude of the magnetic field.
For sinusoidal electromagnetic waves,...

Consider a sinusoidal electromagnetic wave propagating in the +x
direction, whose electric field is parallel to the y axis. The wave
has wavelength 475 nm, and the electric field has amplitude 3.20 x
10^-3 V m-1. What is the frequency of the wave? What is the
amplitude of the magnetic field? What are the vector equations for
E(x,t) and B(x,t)?

A plane electromagnetic wave traveling in the positive direction
of an x axis in vacuum has components Ex = Ey = 0 and Ez = (4.5
V/m) cos[(π × 1015 s-1)(t - x/c)].(a) What is the amplitude of the
magnetic field component?

The magnetic field of an electromagnetic wave in a vacuum is Bz
=(3.8μT)sin((1.15×10^7)x−ωt), where x is in m and t is in s
What is the wavelength, frequency, and electric field amplitude
of the wave?

In SI units, the electric field in an electromagnetic wave is
described by Ey = 118 sin(1.40 107x − ωt).
(a) Find the amplitude of the corresponding magnetic field
oscillations.________ µT
(b) Find the wavelength λ. ___________µm
(c) Find the frequency f. __________Hz

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