The severity of an electrical shock depends on all of the following except: O The duration of the contact with the source of the shock. O Whether the shock is AC (alternating current) or DC (direct current). Whether the source of the electricity is a battery or a DC power supply. O The path the current takes through the body.

The severity of an electrical shock depends on all of the following except: O The duration of the contact with the source of the shock. O Whether the shock is AC (alternating current) or DC (direct current). Whether the source of the electricity is a battery or a DC power supply. O The path the current takes through the body.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter19: Magnetism

Section: Chapter Questions

Problem 69AP: Using an electromagnetic flowmeter (Fig. P19.69), a heart surgeon monitors the flow rate of blood...

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Figure P18.37 shows a simplified model of a cardiac defibrillator, a device used to patients in ventricular fibrillation. When the switch S is toggled to the left, the capacitor C charges through the resistor R .When the switch is toggled to the right, the capacitor discharges current through the patients torso, modeled as the resistor Rtorso, allowing the hearts normal rhythm to be reestablished. (a) If the capacitor is initially uncharged with C = 8.00 F and = 1250 V, find the value of R required to charge the capacitor to a voltage of 775 V in 1.50 s. (b) If the capacitor is then discharged across the patients torso with, Rtorso = 1250 , calculate the voltage across the capacitor after 5.00 ms. Figure P18.37
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The figure below shows a simplified model of a cardiac defibrillator, a device used to resuscitate patients in ventricular fibrillation. When the switch S is toggled to the left, the capacitor C charges through the resistor R. When the switch is toggled to the right, the capacitor discharges current through the patient's torso, modeled as the resistor Rtorso, allowing the heart's normal rhythm to be reestablished. (a) If the capacitor is initially uncharged with C = 7.00 µF and e m f = 1270 V, find the value of R (in ohms) required to charge the capacitor to a voltage of 795 V in 1.60 s. Ω (b) If the capacitor is then discharged across the patient's torso with Rtorso = 1230 Ω, calculate the voltage (in V) across the capacitor after 5.50 ms. V
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The drawing shows a type of flow meter that 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, as in the drawing, electrodes can be used to measure the small voltage that develops across the vessel. Suppose the speed of the blood is 0.35 m/s and the diameter of the vessel is 7.6 mm. In a 0.22-T magnetic field what is the magnitude of the voltage that is measured with the electrodes in the drawing?
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