Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 15, Problem 5P
To determine
To explain:
Determine the piano manufacturer to use a wire with the lengths that are same order of magnitude.
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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
6. In a standard lecture demonstration, a loop of wire, with radius a and resistance R,
levitates over a magnetic-field producing coil.
loop of
wire
i = i, cos ot
Assuming the B field is uniform and vertical in the vicinity of the loop, and has mag-
nitude given by |B| = Bo cos wt, find the current in the loop, ignoring self-inductance.
Find the magnitude of the magnetic force. Can you explain why the loop stays up?
7. In the preceding problems it was stated that self-inductance was to be ignored. How
would the solutions be modified if self-inductance were not ignored?
Design a conductor which is part of large circuit, such thatwhen it is placed in XY plane it produces a magnetic field ofmagnitude 100 mA/meter at point (0, 0, 10). You may assumethat one end of conductor from where the current starts isplaced at origin and leads to the other end of conductor atpoint (x, y) which needs to be determined to design theconductor. The current in conductor must not exceed 10Ampere.
Chapter 15 Solutions
Physics for Scientists and Engineers
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