1.Consider a blood-flow sensor placed around the artery in thefigure below. Assu

Question

1.Consider a blood-flow sensor placed around the artery in thefigure below. Assume the artery has a radius of 2.2 mm and the magnetic field is B =0.051 T. (a) If the blood speed is 23 cm/s, what is the magnitude of the inducedemf? Epsilon = 1 V (b) How does the induced emf change if the artery is smaller, withr = 0.41 mm? Epsilon = V (c) Explain why this type of blood-flow meter is most useful forlarge arteries. 2.A rectangular loop of wire that is 14 cm wide and 49 cmlong is placed in a region where the magnetic field isB = 1.1 T anddirected perpendicular to the plane of the loop. What is themagnitude of the magnetic flux through the loop? 1 Wb

Explanation / Answer

The emf inducted voltage. U=B*l*v. where l = 2r. so U=B*2r*v--both part a and b use this equation for U. -------- as you can see as r increased U is also increased. so it is easierto do if r is larger ------------------------ magnetic flux =B*S*cos. inthis chase. =0 so =B*S. where S be the area of the rectangular. S=14e-2*49e-2. (I dont have a calculator with me so i cant do the numberwork).

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