PHYSICS F/SCI.+ENGRS.,STAND.-W/ACCESS
6th Edition
ISBN: 9781429206099
Author: Tipler
Publisher: MAC HIGHER
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Chapter 24, Problem 43P
(a)
To determine
The capacitance of the tube.
(b)
To determine
The linear charge density on the wire.
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In medicine, it is often important to monitor the blood flow in certain areas of the body. However, the movement of blood is
difficult to monitor directly. Instead, some medical devices use the Hall effect, taking advantage of the fact that the blood flowing
through a vein contains a considerable number of free ions.
В
h
Model the vein in a patient's arm to be of rectangular cross section, as shown in the figure, with a width w = 4.00 mm and
height h = 3.65 mm. The entire section of the vein is immersed in a constant magnetic field of B = 0.0955 T, pointing
horizontally and parallel to the width. A medical device constantly monitors the resulting Hall voltage.
Suppose that medical precautions mandate that the speed of the blood flow for this particular component of the body should
never drop below 15.80 cm/s. At what minimum Hall voltage VH, in millivolts, should the medical device be designed to trigger
an alarm to the medical staff?
VH =
mV
Let ρAl represent the density of aluminum and ρFe that of iron. Find the radius of a solid aluminum sphere that balances a solid iron sphere of radius rFe on an equal-arm balance.
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center. Consider a Geiger counter with an evacuated tube (a vacuum existing between cathode
and anode), where the inner anode has a radius 4 mm and the outer cathode has a radius of 82
mm. The anode has a linear charge density of +18 nC/m, while the cathode has a charge per unit
length of -18 nC/m. Let the cathode potential be equal to zero (using it as voltage reference).
What is the potential at a distance of 142 mm from the center? Express your answer up to four
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Chapter 24 Solutions
PHYSICS F/SCI.+ENGRS.,STAND.-W/ACCESS
Ch. 24 - Prob. 1PCh. 24 - Prob. 2PCh. 24 - Prob. 3PCh. 24 - Prob. 4PCh. 24 - Prob. 5PCh. 24 - Prob. 6PCh. 24 - Prob. 7PCh. 24 - Prob. 8PCh. 24 - Prob. 9PCh. 24 - Prob. 10P
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