Consider the system pictured in the figure below. A ℓ = 18-cm length of conductor of mass 23 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. (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. ________ T _______ Direction (c) What happens if the magnetic field exceeds this minimum value? (The wire slides without friction on the two vertical conductors.) ___________________________________________________________________________________
Consider the system pictured in the figure below. A ℓ = 18-cm length of conductor of mass 23 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.
(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.
________ T
_______ Direction
(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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