**45 Figure 28-44 shows a 4B wood cylinder of mass m = 0.250 kg and length L = 0.100 m, with N = 10.0 turns of wire wrapped around it longitudi- nally, so that the plane of the wire coil contains the long cen- tral axis of the cylinder. The cylinder is released on a plane inclined at an angle 0 to the horizontal, with the plane of the coil parallel to the incline plane. If there is a vertical uniform magnetic field of magni- tude 0.500 T, what is the least current i through the coil that keeps the cylinder from rolling down the plane? sSM Fig. 28-44 Problem 45.

**45 Figure 28-44 shows a 4B wood cylinder of mass m = 0.250 kg and length L = 0.100 m, with N = 10.0 turns of wire wrapped around it longitudi- nally, so that the plane of the wire coil contains the long cen- tral axis of the cylinder. The cylinder is released on a plane inclined at an angle 0 to the horizontal, with the plane of the coil parallel to the incline plane. If there is a vertical uniform magnetic field of magni- tude 0.500 T, what is the least current i through the coil that keeps the cylinder from rolling down the plane? sSM Fig. 28-44 Problem 45.

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter23: Electromagnetic Induction, Ac Circuits, And Electrical Technologies

Section: Chapter Questions

Problem 8CQ: A powerful induction cannon can be made by placing a metal cylinder inside a solenoid coil. The...

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Construct Your Own Problem Consider using the torque on a current-carrying coil in a magnetic field to detect relatively small magnetic fields (less than the field of the Earth, for example). Construct a problem in which you calculate the maximum torque on a current- carrying loop in a magnetic field. Among the things to be considered are the size of the coil, the number of loops it has, the current you pass through the coil, and the size of the field you wish to detect. Discuss whether the torque produced is large enough to be effectively measured. Your instructor may also wish for you to consider the effects, if any, of the field produced by the coil on the surroundings that could affect detection of the small field.
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