Electric rail cars often use magnetic braking. The brake consists of a set of electromagnets that are held just above the rails. To brake the train, the electromagnets are switched on, creating a magnetic field that induces eddy currents in the metal rails passing beneath them. In the figure, which of the choices correctly represents the eddy currents induced in the rails? The diagrams represent a view from above, looking down at the rail through the electromagnet. The electromagnet moves to the right, and the magnetic field points into the screen. ► View Available Hint(s) O A OB O C OD Submit A C Rail B Rail car Electromagnet Detail views of electromagnet and rail, seen from above Moving electromagnet (from above; transparent) Rail + Eddy currents in rail B D

Electric rail cars often use magnetic braking. The brake consists of a set of electromagnets that are held just above the rails. To brake the train, the electromagnets are switched on, creating a magnetic field that induces eddy currents in the metal rails passing beneath them. In the figure, which of the choices correctly represents the eddy currents induced in the rails? The diagrams represent a view from above, looking down at the rail through the electromagnet. The electromagnet moves to the right, and the magnetic field points into the screen. ► View Available Hint(s) O A OB O C OD Submit A C Rail B Rail car Electromagnet Detail views of electromagnet and rail, seen from above Moving electromagnet (from above; transparent) Rail + Eddy currents in rail B D

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.

Question

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Part A
Electric rail cars often use magnetic braking. The brake consists of a set of electromagnets that are held just above the rails. To brake the train, the electromagnets are switched on,
creating a magnetic field that induces eddy currents in the metal rails passing beneath them.
In the figure, which of the choices correctly represents the eddy currents induced in the rails? The diagrams represent a view from above, looking down at the rail through the
electromagnet. The electromagnet moves to the right, and the magnetic field points into the screen.
► View Available Hint(s)
O
C
O
A
m
B
C
D
Submit
Provide Feedback
A
с
Rail
Rail car
Electromagnet
Detail views of electromagnet and rail, seen from above
Moving electromagnet (from above; transparent)
Rail
+
Eddy currents in rail
B
Review
D
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