A 2.0-cm length of wire centered on the origin carries a 20-A current directed in the positive y direction. Determine the magnetic field at the point x = 5.0 m on the x-axis
a. 1.6 nT in the negative z direction
b. 1.6 nT in the positive z direction
c. 2.4 nT in the negative z direction
d. 2.4 nT in the negative z direction
e. None of the above
a
You might also like to view...
What is the average power for an 8.00 mF capacitor attached to a 120 V rms 60.0 Hz source?
A. 240 W B. 120 W C. 85.0 W D. 60.0 W E. 0.000
You are heating a jar full of hydrogen and observing its spectrum. When you add more hydrogen to it, what happens to the spectral lines in the spectrum?
A. The positions of emission lines will change. B. The positions of emission lines will remain the same, but the lines will get broader and brighter. C. You will start seeing lots of absorption lines instead of emission lines. D. There will be no change in the spectrum.
Two balls have the same weight and surface texture, but one has twice the diameter of the other. How many times larger is the terminal speed of the smaller ball falling through air than that of the bigger ball?
A. The balls fall with the same speed in air. B. The smaller ball’s terminal speed is [2]1/2 times larger than the other’s. C. The smaller ball’s terminal speed is 2 times larger than the other’s. D. The smaller ball’s terminal speed is 4 times larger than the other’s. E. The smaller ball’s terminal speed is some other multiple of the other’s (specify).
The average rate of erosion on the Moon is far less than on Earth because:
A) the crust of the Moon is much denser than the Earth's crust. B) the Moon is much younger than the Earth. C) the Moon lacks wind, water and an atmosphere. D) the Moon's magnetic field protects it from the solar wind better than ours does. E) the Moon's mare long ago dried up, so there is no more wave erosion there.