Chapter 22: Q62PE (page 814)
Inside a motor, 30.0 Apasses through a 250-turn circular loop that is 10.0 cmin radius. What is the magnetic field strength created at its center?
Short Answer
The magnetic field strength calculated is 0.047 T.
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Chapter 22: Q62PE (page 814)
Inside a motor, 30.0 Apasses through a 250-turn circular loop that is 10.0 cmin radius. What is the magnetic field strength created at its center?
The magnetic field strength calculated is 0.047 T.
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Suppose two long straight wires run perpendicular to one another without touching. Does one exert a net force on the other? If so, what is its direction? Does one exert a net torque on the other? If so, what is its direction? Justify your responses by using the right hand rules.
Make a drawing and use RHR-2 to find the direction of the magnetic field of a current loop in a motor (such as in Figure 22.34). Then show that the direction of the torque on the loop is the same as produced by like poles repelling and unlike poles attracting.

If a charged particle moves in a straight line through some region of space, can you say that the magnetic field in that region is necessarily zero?
What is the maximum force on an aluminum rod with a 0.100-µC charge that you pass between the poles of a 1.50-T permanent magnet at a speed of 5.00 m/s? In what direction is the force?
Is the Earth’s magnetic field parallel to the ground at all locations? If not, where is it parallel to the surface? Is its strength the same at all locations? If not, where is it greatest?
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