A conducting rod of length = 25 cm is placed on a U-shaped metal wire that is connected to a lightbulb having a resistance of 8.0 , as shown in the figure. The wire and the rod are in the plane of the page. A constant uniform magnetic field of strength 0.40 T is applied perpendicular to and into the paper. An applied external force pulls the rod to the right with a constant speed of 6.0 m/s. a) Calculate the induced emf in the rod. b) Find the magnitude and the direction of the induced current in the resistor. c) Calculate the power dissipated in the resistor during the time when the rod moves in the field. d) Calculate the external force necessary to move the rod at constant speed through the magnetic field. X X X X X X > x X X X X X X X X X X X X X X X X X X> x X X X X X X X X X X > X X X X X X X xx X X B-field in (x) F applied

A conducting rod of length = 25 cm is placed on a U-shaped metal wire that is connected to a lightbulb having a resistance of 8.0 , as shown in the figure. The wire and the rod are in the plane of the page. A constant uniform magnetic field of strength 0.40 T is applied perpendicular to and into the paper. An applied external force pulls the rod to the right with a constant speed of 6.0 m/s. a) Calculate the induced emf in the rod. b) Find the magnitude and the direction of the induced current in the resistor. c) Calculate the power dissipated in the resistor during the time when the rod moves in the field. d) Calculate the external force necessary to move the rod at constant speed through the magnetic field. X X X X X X > x X X X X X X X X X X X X X X X X X X> x X X X X X X X X X X > X X X X X X X xx X X B-field in (x) F applied

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter12: Sources Of Magnetic Fields

Section: Chapter Questions

Problem 26P: The two long, parallel wires shown in the accompanying figure carry currents in the same direction....

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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

A conducting rod of length = 25 cm is placed on a
U-shaped metal wire that is connected to a lightbulb
having a resistance of 8.0 , as shown in the figure.
The wire and the rod are in the plane of the page. A
constant uniform magnetic field of strength 0.40 T
is applied perpendicular to and into the paper. An
applied external force pulls the rod to the right with
a constant speed of 6.0 m/s.
a) Calculate the induced emf in the rod.
b) Find the magnitude and the direction of the
induced current in the resistor.
c) Calculate the power dissipated in the resistor
during the time when the rod moves in the field.
d) Calculate the external force necessary to move
the rod at constant speed through the magnetic
field.
X
X
X
X
X
X >
x
X
X X X X X
X
X X X X X X
X X X X X>
X
X
X X X X X
x
X
X X X >
X
X
X
X
X
X
XX
X
X
B-field in (x)
F applied

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