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Chapter 22: Q60PE (page 814)

What are the directions of the currents in the loop and coils shown in Figure 22.61?

Short Answer

Expert verified

In part (a): In a clockwise direction.

In part (b): As seen from the right, counter-clockwise.

In part (c): As seen from the left, counter-clockwise.

Step by step solution

01

Define current

The movement of free charges such as electrons and ions is known as current.

02

The direction of current

In each of the three cases, we must use the right-hand rule to determine the direction of the currents.

(a)After using the right-hand rule, the direction of current in the loop is found to be Clockwise.

(b)After using the right-hand rule, the direction of current in the coil is found to be, counter-clockwise.

(c) After using the right-hand rule, the direction of current in the coil is found to be, counter-clockwise.

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Most popular questions from this chapter

Which is more likely to interfere with compass readings, AC current in your refrigerator or DC current when you start your car? Explain.

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.

(a) A 0.750-m-long section of cable carrying current to a car starter motor makes an angle of 60º with the Earth’s 5.50×10‐5field. What is the current when the wire experiences a force of 7.00×10‐3? (b) If you run the wire between the poles of a strong horseshoe magnet, subjecting 5.00 cm of it to a 1.75-T field, what force is exerted on this segment of wire?

A cosmic ray electron moves at\({\rm{7}}{\rm{.50 \times 1}}{{\rm{0}}^{\rm{6}}}{\rm{ m/s}}\)perpendicular to the Earth’s magnetic field at an altitude where field strength is\({\rm{1}}{\rm{.00 \times 1}}{{\rm{0}}^{{\rm{ - 5}}}}{\rm{ T}}\). What is the radius of the circular path the electron follows?

(a) A pendulum is set up so that its bob (a thin copper disk) swings between the poles of a permanent magnet as shown in Figure 22.63. What is the magnitude and direction of the magnetic force on the bob at the lowest point in its path, if it has a positive0.250μCcharge and is released from a height of 30.0 cmabove its lowest point? The magnetic field strength is 1.50 T (b) What is the acceleration of the bob at the bottom of its swing if its mass isgrams and it is hung from a flexible string? Be certain to include a free-body diagram as part of your analysis.
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