Pol Gra Des Poll In medicine, it is often important to monitor the blood flow in

Question

Pol Gra Des Poll 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 amount of free ions. Ot 0 You You ans atte As a simplification, we consider the vein in a patient's arm to be of rectangular cross-section, as shown above, with the width of the vein at w = 4.00 mm and height h = 3.45 mm. The entire section of the vein is immersed in a constant magnetic field of 0.0755 tesla pointing horizontally. The equipment (not shown) constantly monitors the resulting Hall voltage DeT Suppose medical precautions mandate that the speed of the blood flow for this particular component of the medical device to t nger an alarm o the medicat staffnimum Hall vollage (in millivolts) should you design the O He Number O Wel mV * Hypothetical. Tec Previous er, veititt Mewar iruswe waitten D check AnswerNextExit 8Hint

Explanation / Answer

h = 3.45 mm = 3.45 * 10-3 m

v = 23.80 cm/s = 0.238 m/s

minimum Hall voltage = B v h

= 0.0755 * 23.8 * 10-2 * 3.45 * 10-3

minimum Hall voltage = 6.19 * 10-5 V = 0.0619 mV

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