5. Consider the system pictured in Figure P19.21. A 15-cm length of conductor of mass 15 g, free to move vertically, is placed between two thin, vertical conductors, and a uniform magnetic field acts perpendicular to the page. When a 5.0-A current is directed as shown in the figure, the horizontal wire moves upward at constant velocity in the presence of gravity. -15 cm 5.0 A 5.0 A| 5.0 A
5. Consider the system pictured in Figure P19.21. A 15-cm length of conductor of mass 15 g, free to move vertically, is placed between two thin, vertical conductors, and a uniform magnetic field acts perpendicular to the page. When a 5.0-A current is directed as shown in the figure, the horizontal wire moves upward at constant velocity in the presence of gravity. -15 cm 5.0 A 5.0 A| 5.0 A
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Transcribed Image Text:5. Consider the system pictured in Figure P19.21. A 15-cm length of conductor of mass
15 g, free to move vertically, is placed between two thin, vertical conductors, and a
uniform magnetic field acts perpendicular to the page. When a 5.0-A current is directed
as shown in the figure, the horizontal wire moves upward at constant velocity in the
presence of gravity.
-15 cm-
5.0 A
5.0 A
T5.0 A
Figure P19.21
Transcribed Image Text:(a) What forces act on the horizontal wire, and under what condition is the wire able
to move upward at constant velocity?
(b) Find the magnitude and direction of the minimum magnetic field required to move
the wire at constant speed.
(c) What happens if the magnetic field exceeds this minimum value? (The wire slides
without friction on the two vertical conductors.)
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