Concept explainers
Videos
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 C2009 Guided Reading & Study Workbook Se
Additional Science Textbook Solutions
Microbiology: An Introduction
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
Cosmic Perspective Fundamentals
Laboratory Experiments in Microbiology (12th Edition) (What's New in Microbiology)
Human Physiology: An Integrated Approach (8th Edition)
Human Anatomy & Physiology (2nd Edition)
- pls helparrow_forwardJ K L The graph in the figure shows the position of an object as a function of time. The letters H-L represent particular moments of time. At which moments shown (H, I, etc.) is the speed of the object the greatest? + Position H I K Timearrow_forward1. Two pendula of slightly different length oscillate next to each other. The short one oscillates with frequency 0.52 Hz and the longer one with frequency 0.50 Hz. If they start of in phase determine their phase difference after 75 s.arrow_forward
- A mass is connect to a vertical revolving axle by two strings of length L, each making an angle of 45 degrees with the axle, as shown. Both the axle and mass are revolving with angular velocity w, Gravity is directed downward. The tension in the upper string is T_upper and the tension in the lower string is T_lower.Draw a clear free body diagram for mass m. Please include real forces only.Find the tensions in the upper and lower strings, T_upper and T_lowerarrow_forward2. A stone is dropped into a pool of water causing ripple to spread out. After 10 s the circumference of the ripple is 20 m. Calculate the velocity of the wave.arrow_forward10. Imagine you have a system in which you have 54 grams of ice. You can melt this ice and then vaporize it all at 0 C. The melting and vaporization are done reversibly into a balloon held at a pressure of 0.250 bar. Here are some facts about water you may wish to know. The density of liquid water at 0 C is 1 g/cm³. The density of ice at 0 C is 0.917 g/cm³. The enthalpy of vaporization of liquid water is 2.496 kJ/gram and the enthalpy of fusion of solid water is 333.55 J/gram. A. How much energy does the ice absorb as heat when it melts? B. How much work is involved in melting the ice? C. What is the total change in energy for melting the ice? D. What is the enthalpy change for melting the ice? E. What is the entropy change for melting the ice? F. What is the change in Helmholtz energy for melting the ice? G. What is the change in Gibbs energy for melting the ice?arrow_forward
- In the figure Q = 5.7 nC and all other quantities are accurate to 2 significant figures. What is the magnitude of the force on the charge Q? (k = 1/4πε 0 = 8.99 × 109 N · m2/C2)arrow_forwardNow add a fourth charged particle, particle 3, with positive charge q3, fixed in the yz-plane at (0,d2,d2). What is the net force F→ on particle 0 due solely to this charge? Express your answer (a vector) using k, q0, q3, d2, i^, j^, and k^. Include only the force caused by particle 3.arrow_forwardFor a tornadoes and hurricanes, which of the following is most critical? an alert a watch a warning a predictionarrow_forward
- When a warm front advances up and over a cold front, what is it called? front inversion stationary front cold front occlusion warm front occlusionarrow_forward1) Consider two positively charged particles, one of charge q0 (particle 0) fixed at the origin, and another of charge q1 (particle 1) fixed on the y-axis at (0,d1,0). What is the net force F→ on particle 0 due to particle 1? Express your answer (a vector) using any or all of k, q0, q1, d1, i^, j^, and k^. 2) Now add a third, negatively charged, particle, whose charge is −q2− (particle 2). Particle 2 fixed on the y-axis at position (0,d2,0). What is the new net force on particle 0, from particle 1 and particle 2? Express your answer (a vector) using any or all of k, q0, q1, q2, d1, d2, i^, j^, and k^. 3) Particle 0 experiences a repulsion from particle 1 and an attraction toward particle 2. For certain values of d1 and d2, the repulsion and attraction should balance each other, resulting in no net force. For what ratio d1/d2 is there no net force on particle 0? Express your answer in terms of any or all of the following variables: k, q0, q1, q2.arrow_forwardA 85 turn, 10.0 cm diameter coil rotates at an angular velocity of 8.00 rad/s in a 1.35 T field, starting with the normal of the plane of the coil perpendicular to the field. Assume that the positive max emf is reached first. (a) What (in V) is the peak emf? 7.17 V (b) At what time (in s) is the peak emf first reached? 0.196 S (c) At what time (in s) is the emf first at its most negative? 0.589 x s (d) What is the period (in s) of the AC voltage output? 0.785 Sarrow_forward
College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
University Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSON
Introduction 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 Learning
Lecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-Wesley
College Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON