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10. –/7 points Notes Question: SerPSE7 29.P.061. A heart surgeon monitors the flow rate of blood through an

artery using an electromagnetic flowmeter (see the figure below). Electrodes A and B make contact with the outer surface of the blood vessel, which has interior diameter 3.00 mm. (a) For a magnetic field magnitude of 0.0400 T, an emf of 118 µV appears between the electrodes. Calculate the speed of the blood. m/s (b) Verify that electrode A is positive as shown. Does the sign of the emf depend on whether the mobile ions in the blood are predominantly positively or negatively charged? Explain.

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