Problem A flow meter can be used to measure the speed of blood in situations whe

ID: 2134949 • Letter: P

Question

Problem

A flow meter can be used to

measure the speed of blood in situations when a blood vessel is

sufficiently exposed (e.g., during surgery). Blood is conductive enough

that it can be treated as a moving conductor. When it flows perpendicularly

with respect to a magnetic field, electrodes can be used

to measure the small voltage that develops across the vessel. Suppose

that the speed of the blood is 0.30 m/s and the diameter of the vessel is

5.6 mm. In a 0.60-T magnetic field what is the magnitude of the voltage

that is measured with the electrodes?

emf = B*v*L*sin(90) = 0.6*0.3*5.6*10^-3*1= 1.008*10^-3 volts = 1.008 mV

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.