Part A What force is felt by a singly ionized (positive) sodium ion? Submit My A
ID: 1325632 • Letter: P
Question
Part A
What force is felt by a singly ionized (positive) sodium ion?
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Part B
Charges in the blood will separate until they produce an electric field that cancels this magnetic force. What will be the resulting electric field?
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Part C
What voltage will this electric field produce across an artery with a diameter of 3.6mm ?
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F_B = N Typical blood velocities in the coronary arteries range from 10.0 to 30.0 cm/s . An electromagnetic flowmeter applies a magnetic field of 0.234T to a coronary artery with a blood velocity of 10.1cm/s . As we see in the figure, this field will exert a force on ions in the blood, which will separate. The ions will separate until they make an electric field that exactly balances the magnetic force. This electric field produces a voltage that can be measured.(Figure 1) Part A What force is felt by a singly ionized (positive) sodium ion? SubmitMy AnswersGive Up Part B Charges in the blood will separate until they produce an electric field that cancels this magnetic force. What will be the resulting electric field? SubmitMy AnswersGive Up Part C What voltage will this electric field produce across an artery with a diameter of 3.6mm ? SubmitMy AnswersGive UpExplanation / Answer
An electro magnetic flowmeter applies a magnetic field of B = 0.234 T
Artery blood velocity of v = 10.1 cm /s
= 0.101 m/s
a ) Force is felt by singly ionized sodium
F = q v B
= 1.6*10^-19 C * 0.101 m/s * 0.234 T
= 3.78*10^-21 N
b ) resulting electric field is E_H = v * B
= 0.101 m/s * 0.234 T
= 0.0236 N / C
c ) Hall voltage is V_H = E_H * d
= 0.0236 N / C * 3.6*10^-3 m
= 0.8496*10^-4 V