Blood contains positive and negative ions, which experience a magnetic force in a magnetic field as they move. An Electromagnetic Flowmeter takes advantage of this phenomenon. A heart surgeon monitors the flow rate of blood through an artery. Electrodes make contact with the outer surface of the blood vessel to measure an induced voltage. For a magnetic field strength of 0.037 T, a potential difference of 160 µV appears between the electrodes for a blood vessel of inside diameter 2.9 mm.
a) How fast is the blood flowing in the artery?
Potential difference electrodes will be:
emf = B*v*L*sinA
here, B = magnetic field = 0.037 T
v = speed of blood in artery = ??
L = width of artery = diameter = 2.9 mm = 2.9*10^-3 m
A = angle between velocity vector and magnetic field vector = 90 deg
given, emf = 160 uV = 160*10^-6 V
then, v = emf/(B*L*sinA)
v = (160*10^-6)/(0.037*2.9*10^-3*sin(90 deg))
v = 1.49 m/s
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Blood contains positive and negative ions, which experience a magnetic force in a magnetic field as...
2.5 Blood contains positive and negative ions, which experience a magnetic force in a magnetic field as they move. An Electromagnetic Flowmeter takes advantage of this phenomenon. A heart surgeon monitors the flow rate of blood through an artery. Electrodes make contact with the outer surface of the blood vessel to measure an induced voltage. For a magnetic field strength of 0.037 T, a potential difference of 160 u V appears between the electrodes for a blood vessel of inside...
2.5 Blood contains positive and negative ions, which experience a magnetic force in a magnetic field as they move. An Electromagnetic Flowmeter takes advantage of this phenomenon. A heart surgeon monitors the flow rate of blood through an artery. Electrodes make contact with the outer surface of the blood vessel to measure an induced voltage. For a magnetic field strength of 0.037 T, a potential difference of 160 uV appears between the electrodes for a blood vessel of inside diameter...
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