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Chapter 29: Q. 11 (page 829)
The south pole of a bar magnet is brought toward the current loop of FIGURE Q29.11. Does the bar magnet attract, repel, or have no effect on the loop? Explain.
The magnet will repel the loop.
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The twolong parallel wires in FIGURE EX29.34 are separated by . For what value of the resistor R will the force between the two wires be ?
Particle accelerators, such as the Large Hadron Collider, use magnetic fields to steer charged particles around a ring. Consider a proton ring with 36 identical bending magnets connected by straight segments. The protons move along a -m-long circular arc as they pass through each magnet. What magnetic field strength is needed in each magnet to steer protons around the ring with a speed of ? Assume that the field is uniform inside the magnet, zero outside.
a. What is the magnitude of the torque on the current loop in FIGURE EX29.40?
b. What is the loop’s equilibrium orientation?
At what distance on the axis of a current loop is the magnetic field half the strength of the field at the center of the loop? Give your answer as a multiple of R.
The wire is broken on the right side of the circuit in FIGURE Q28.3. What is the potential difference between points ? Explain.
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