In important to monitor the blood flow in certain areas of the body. However,the
ID: 1446001 • Letter: I
Question
In important to monitor the blood flow in certain areas of the body. However,the movement of blood is advantage of the fact that the blood flowing through a in contains a considerable amount of free ions. 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 heighth 3.35 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. Suppose medical precautions mandate that the speed of the blood flow for this particular component of the body should never drop below 22.50 cm/s. At what minimum Hall voltage (in millivolts) should you design the medical device to trigger an alarm to the medical staff? Number mvExplanation / Answer
w =4 mm , h =3.35 mm, B =0.0755 T, vd =22.5 cm/s
VH = vd*w*B = (0.225*4*10^-3*0.0755)
VH = 0.068 mV