Concept explainers
Three pairs of electromagnets made with identical iron cores are shown below. Note the number of turns of wire, each of which carries the same current.
a. Rank the
b. Rank the electromagnet pairs A, B, and C in terms of the magnitude of the magnetic field at the exact midpoint between the electromagnets.
(a)
To Find: the rank of the electromagnet pairs A, B, and C in terms of the force between the electromagnets, if electromagnets are made with identical iron cores having several turns of wire and the same passing current.
Answer to Problem 22A
The rank is B, C, A
Explanation of Solution
Introduction:
An electromagnet is a magnet in which the magnetic field exists when current passes through a conducting wire wrapped around an iron core.
Explanation:
The magnetic field is produced by an electric current. The magnetic field surrounding a bar magnet is shown by drawing the magnetic lines of force. Opposite poles of a magnet attract. The number of turns on the coil generates a strong field of attraction/repulsion.
So, in the given figure A, B, and C iron cores A and B have the same number of turns but their orientation is different. With the orientation of iron cores, the iron core A has strong repulsive (like poles), B has strong attractive (unlike) and C has again repulsive (like). The rank would be strongly attractive to strong repulsive as B, C, and A.
Conclusion:
Considering the number of turns on the iron core and their orientation concerning poles, the rank would be B, C, and A.
(b)
To Find: The rank of the electromagnet pairs A, B, and C if electromagnets are made with identical iron cores having several turns of wire passing with same current.
Answer to Problem 22A
The rank is B, A = C.
Explanation of Solution
Introduction:
The magnetic field depends on
- the current passing through the conductor
- The distance of the point from the conductor.
More the current pass, more is the magnetic field.
Explanation:
The magnetic field can be generated due to electric current passing through conductor. So, if electric current is increased magnetic field also increases. Magnetic field also depends upon the core material.
According to the given figure, iron cores A and B are having equal number of turns in them. But the orientation is different resulting in different magnetic fields for both cases.
Since, iron cores A and C are having like poles, so iron cores A and C will have zero magnetic field. And, iron core B is having the unlike poles, so it has a stronger magnetic field than the other two. Hence, the ranking is given as B, A = C.
Conclusion:
Hence, according to the number of turns and orientation of the magnetic field, the electromagnets are ranked as B, A = C.
Chapter 36 Solutions
Conceptual Physics: The High School Physics Program
Additional Science Textbook Solutions
Conceptual Integrated Science
Cosmic Perspective Fundamentals
College Physics: A Strategic Approach (4th Edition)
College Physics: A Strategic Approach (3rd Edition)
Physics (5th Edition)
Conceptual Physical Science (6th Edition)
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON