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Chapter 31: Q. 16 (page 901)
a. What is the magnetic field amplitude of an electromagnetic wave whose electric field amplitude is
b. What is the intensity of the wave
a.Magnetic field amplitude of an electromagnetic wave is .
b.Intensity of the wave is.
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1. Andre is flying his spaceship to the left through the laboratory magnetic field of FIGURE Q31.1.
a. Does Andre see a magnetic field? If so, in which direction does it point?
b. Does Andre see an electric field? If so, in which direction does it point?
In reading the instruction manual that came with your garagedoor opener, you see that the transmitter unit in your car produces asignal and that the receiver unit is supposed to respond to a radio wave at this frequency if the electric field amplitude exceeds. You wonder if this is really true. To find out, you put fresh batteries in the transmitter and start walking away from your garage while opening and closing the door. Your garage door finally fails to respond when you're away. What is the electric field amplitude at the receiver when it first fails
A diameter parallel-plate capacitor has a gap. What is the displacement current in the capacitor if the potential difference across the capacitor is increasing at ?
For a science project, you would like to horizontally suspend an by inch sheet of black paper in a vertical beam of light whose dimensions exactly match the paper. If the mass of the sheet is , what light intensity will you need
In FIGURE P31.33, a circular loop of radius travels with speed along a charged wire having linear charge density . The wire is at rest in the laboratory frame, and it passes through the center of the loop.
a. What are and at a point on the loop as measured by a scientist in the laboratory? Include both strength and direction.
b. What are the fields and at a point on the loop as measured by a scientist in the frame of the loop?
c. Show that an experimenter in the loop鈥檚 frame sees a currentpassing through the center of the loop.
d. What electric and magnetic fields would an experimenter in the loop鈥檚 frame calculate at distance r from the current of part c?
e. Show that your fields of parts b and d are the same.
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