1. A circular current loop, of radius 2.0 mm and carrying a current 0.3 A is placed 5 cm from a long straight wire carrying a current of 2 A. (a) Sketch a diagram indicating the magnetic field created by the long wire, and showing how the current loop could be oriented to obtain maximum torque from the wire's magnetic field (b) Calculate the magnitude and direction of the torque for this orientation. (c) What is the loop's equilibrium orientation (i.e., no torque)?

1. A circular current loop, of radius 2.0 mm and carrying a current 0.3 A is placed 5 cm from a long straight wire carrying a current of 2 A. (a) Sketch a diagram indicating the magnetic field created by the long wire, and showing how the current loop could be oriented to obtain maximum torque from the wire's magnetic field (b) Calculate the magnitude and direction of the torque for this orientation. (c) What is the loop's equilibrium orientation (i.e., no torque)?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter19: Magnetism

Section: Chapter Questions

Problem 28P: At a certain location, Earth has a magnetic field of 0.60 104 T, pointing 75 below the horizontal...

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A uniform horizontal wire with a linear mass density of 0.50 g/m carries a 2.0-A current. It is placed in a constant magnetic field with a strength of 4.0 103 T. The field is horizontal and perpendicular to the wire. As the wire moves upward starting from rest, (a) what is its acceleration and (b) how long does it take to rise 0.50 m? Neglect the magnetic field of Earth.
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A current path shaped as shown in Figure P30.13 produces a magnetic field at P, the center of the arc. If the arc subtends an angle of = 30.0 and the radius of the arc is 0.600 in. what are the magnitude and direction of the Held produced at P if the current 3.00 A?
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At a certain location, Earth has a magnetic field of 0.60 104 T, pointing 75 below the horizontal in a north-south plane. A 10.0-m-long straight wire carries a 15-A current, (a) If the current is directed horizontally toward the east, what are the magnitude and direction of the magnetic force on tile wire? (b) What are the magnitude and direction of the force if the current is directed vertically upward?
As seen in previous chapters, any object with electric charge, stationary or moving, other than the charged object that created the field, experiences a force in an electric field. Also, any object with electric charge, stationary or moving, can create an electric field (Chapter 22). Similarly, an electric current or a moving electric charge, other than the current or charge that created the field, experiences a force in a magnetic field (Chapter 28), and an electric current creates a magnetic field (Section 29.1). (a) To understand how a moving charge can also create a magnetic field, consider a particle with charge q moving with velocity v. Define the position vector r=rr leading from the particle to some location. Show that the magnetic field at that location is B=04qvrr2 (b) Find the magnitude of the magnetic field 1.00 mm to the side of a proton moving at 2.00 107 m/s. (c) Find the magnetic force on a second proton at this point, moving with the same speed in the opposite direction. (d) Find the electric force on the second proton.