OER 2016 Edition

ISBN: 9781947172173

Author: OpenStax

Publisher: OpenStax College

Concept explainers

A magnetic force arises when a charged particle or a current-carrying conductor is placed in a magnetic field. It is created because of the movement of the charged particles.

Textbook Question

Chapter 23, Problem 23PE

Integrated Concepts

Derive an expression for the current in a system like that in Figure 23.11, under the following conditions. The resistance between the rails is R, the rails and the moving red are identical in cross section A and have the same resistivity ρ . The distance between the rails is l, and the rod moves at constant speed v perpendicular to the uniform field B. At time zero, the moving red is next to the resistance R.

Chapter 23, Problem 23PE, Integrated Concepts Derive an expression for the current in a system like that in Figure 23.11, , example 1

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Chapter 23, Problem 22PE

Chapter 23, Problem 24PE

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Question 4. b. Points b and c passing through each resistor in the circuit in the figure potential difference between them. Question 5, a. Define the magnetic field. You can properly describe reinforcements to a magnetic field charge q. b. An electron in a television tube is traveling through the x-axis at a speed of 3x106 m/s. B=0.028 T makes the earth 30° with x in the xy plane. Find the acceleration of the electron. sin30°=0.5 , qe=-1.6x10**C, m, = 9.1x10-31 kg, cos30°=0.86 6=30

Q4: Show detailed work and pay attention to the units. There are two different ways to calculate the potential difference across the bar, using the motional EMF expression or Faraday's Law. Show that both methods give the same answer. Use the right hand rule to figure out which end of the bar (A or B) will be at a higher potential due to the motion of the conductor in the field.

A straight rod moves along parallel con- ducting rails, as shown. The rails are con- nected at the left side through a resistor so that the rod and rails form a closed rectangu- lar loop. A uniform field perpendicular to the movement of the rod exists throughout the region. Assume the rod remains in contact with the rails as it moves. The rod experiences no friction or air drag. The rails and rod have negligible resistance. 3.7 T 3.7 T At what speed should the rod be moving to produce the downward current in the resistor? Answer in units of m/s. 0.39 A – ® 7.6 g 1.6 m

Chapter 23 Solutions

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