
The figure shows the time variation of the magnitude of the electric field of an electromagnetic...
Question 20 10 pts The figure shows the time variation of the magnitude of the electric field of an electromagnetic wave produced by a wire antenna. Determine the (a)frequency and (b) wavelength of the wave. Equations: f = 1 where T' is time perood, c = c = f1 where c = 3.02109 10.0 3.0 7,0 1(x10-ºs) 1.0 9.0 -10.0 (a)2.5 10 Hz (b) 1.2 m (a) 5,0 10% Hz (b) 0.6 m (a)1.25 x 10 Hz (b) 0.6 m...
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3 pts Question 18 The figure below shows the time variation of the magnitude of the electric field of an electromagnetic wave produced by a wire antenna. To which region of the electromagnetic spectrum does this wave belong? 10.0 3.0 7.0 E(N/C) + (x1023) 1.0 5.0 9.0 -10.0 radio waves O X-rays gamma rays visible light infrared radiation Question 10
The magnetic field of an electromagnetic wave has a peak value of 5.0 × 10-10 T. What is the intensity of the wave? (c = 3.0 × 108 m/s, c = 3.00 × 108 m/s, μ0 = 4π × 10-7 T • m/A 1.0 × 10-13 W/m2 7.5 × 105 W/m2 1.5 × 10-5 W/m2 2.0 × 10-13 W/m2 3.0 × 10-5 W/m2
An electromagnetic wave traveling in the -x direction in vacuum
has a frequency 2x1014Hz. The electric field in the wave has
maximum value of 2 V/m. If we define the time and position such
that the electric field has maximum value at position x=0 at
time=0, a possible equation describing the electric field is:
"⃗
a. ?=(2V/m)sin[(4.2x106 /m)x-(1.3x1015Hz)t]?̂
"⃗ ' b. ?=(2V/m)cos[(4.2x106 /m)x+(1.3x1015Hz)t]?
"⃗ ' c. ?=(1V/m)sin[(1.3x1015 /m)x-(4.2x106Hz)t]?
"⃗
d. ?=(4V/m)cos[(4.2x106 /m)x+(1.3x1015Hz)t]?̂
2. An electromagnetic wave traveling in the -x...
The electric field of an electromagnetic wave points in the negative y-direction. At the same time, the magnetic field of this wave points in the negative x-direction. In what direction is the wave traveling? +x-direction -x-direction +y-direction -y-direction +z-direction -z-direction Find the frequency of blue light with a wavelength of 454 nm. Hz What is the rms value of the electric field in a sinusoidal electromagnetic wave that has a maximum electric field of 94 V/m? V/m
Which of the following is a possible equation for the electric
field of an electromagnetic wave with average intensity 0.00132W/m2
traveling in the +z direction with a magnetic field along the x
axis?
a. ?=(2 V/m) sin [(9.8x106 /m)z + (2.9x10^15 Hz)t]
?̂
b. ?=(1 V/m) sin [(9.8x106 /m)z - (2.9x10^15 Hz)t]
?̂
c. ?=(1 V/m) sin [(9.8x106 /m)z - (2.9x10^15 Hz)t]
?̂
d. ?=(2 V/m) sin [(9.8x106 /m)z + (2.9x10^15 Hz)t]
?̂
Which of the following is a possible...
The electric field of an electromagnetic wave is given by E=(4.35×102)sin(4.55×106*π(x-3.0×108*t)) where everything is in SI units. What is the wave's frequency?
21. Which of the following is a possible equation for the electric field of an electromagnetic wave with average intensity 0.00132W/m² traveling in the +z direction with a magnetic field along the x axis? a. E = (2 V/m) sin [(9.8 x 106/mz+ (2.9 x1015 Hz)t) i b. Ē = (1 V/m) sin [(9.8 x 106 /m) - (2.9 x1015 Hz)t]î E = (1 V/m) sin [(9.8 x 106 /m) - (2.9 x1015 Hz)t] il E = (2 V/m) sin...
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The electric field associated with an electromagnetic wave is expressed as, E(r, t) = [2i - 3j + 2k] (10^4 V/m) cos [{5X10^7 pi (x + 2y + 2z)/3) - 15 pi X 10^15 t], where x, y, z are in meter and t is in second. Find (a) the direction of propagation, (b) velocity, (c) wavelength, (d) B(r, t), and (e) intensity and (f polarization state of the wave.
Problem 6. Electromagnetic plane waves in a lossy medium The electric field of an electromagnetic plane wave traveling in a lossy medium can be written as where z is the distance, t is time, and fthe frequency. For f 1 GHz, it is found by measurement that the amplitude of the electric field is attenuated by a factor of 3 after the wave travels 100 m (i.e., to 1/3 of the amplitude at z-0 when it arrives at z- 100...