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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?
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.
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Use the right-hand rules to show that the force between the two loops in Figure 22.49 is attractive if the currents are in the same direction and repulsive if they are in opposite directions. Is this consistent with like poles of the loops repelling and unlike poles of the loops attracting? Draw sketches to justify your answers.
Consider a mass separator that applies a magnetic field perpendicular to the velocity of ions and separates the ions based on the radius of curvature of their paths in the field. Construct a problem in which you calculate the magnetic field strength needed to separate two ions that differ in mass, but not charge, and have the same initial velocity. Among the things to consider are the types of ions, the velocities they can be given before entering the magnetic field, and a reasonable value for the radius of curvature of the paths they follow. In addition, calculate the separation distance between the ions at the point where they are detected.
Nonnuclear submarines use batteries for power when submerged.
(a) Find the magnetic field 50.0 cm from a straight wire carrying 1200 A from the batteries to the drive mechanism of a submarine.
(b) What is the field if the wires to and from the drive mechanism are side by side?
(c) Discuss the effects this could have for a compass on the submarine that is not shielded.
A wire carrying a current passes between the poles of a strong magnet that is perpendicular to its field and experiences a force on the of wire in the field. What is the average field strength?
A charged particle having mass \({\rm{6}}{\rm{.64 \times 1}}{{\rm{0}}^{{\rm{ - 27}}}}{\rm{\;kg}}\) (that of a helium atom) moving at \({\rm{8}}{\rm{.70 \times 1}}{{\rm{0}}^{\rm{5}}}{\rm{\;m/s}}\) perpendicular to a \({\rm{1}}{\rm{.50 - T}}\) magnetic field travels in a circular path of radius \({\rm{16}}{\rm{.0\;mm}}\).(a)What is the charge of the particle?(b)What is unreasonable about this result?(c)Which assumptions are responsible?
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