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Chapter 32: Q41P (page 969)
A magnet in the form of a cylindrical rod has a length of and a diameter of. It has a uniform magnetization of. What is its magnetic dipole moment?
The magnetic dipole moment is .
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Earth has a magnetic dipole moment of . (a) What current would have to be produced in a single turn of wire extending around Earth at its geomagnetic equator if we wished to set up such a dipole? Could such an arrangement be used to cancel out Earth鈥檚 magnetism (b) at points in space well above Earth鈥檚 surface or (c) on Earth鈥檚 surface?
: Assume the average value of the vertical component of Earth鈥檚 magnetic field is (downward) for all of Arizona, which has an area of . (a)What is the magnitude and (b) What is the direction (inward or outward) of the net magnetic flux through the rest of Earth鈥檚 surface (the entire surface excluding Arizona)?
What is the measured component of the orbital magnetic dipole moment of an electron with the values (a) and (b)?
Two wires, parallel to a z-axis and a distance 4rapart, carry equal currents i in opposite directions, as shown in Figure. A circular cylinder of radius r and length L has its axis on the z-axis, midway between the wires. Use Gauss鈥� law for magnetism to derive an expression for the net outward magnetic flux through the half of the cylindrical surface above the xaxis. (Hint: Find the flux through the portion of the xzplane that lies within the cylinder.)
(a) What is the measured component of the orbital magnetic dipole moment of an electron with(b) What is the measured component of the orbital magnetic dipole moment of an electron with
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