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Problem 37 Medium Difficulty

Figure P 18.37 shows a simplified model of a cardiac defibrillator, a device used to resuscitate patients in ventricular fibrillation. When the switch $\mathrm{S}$ 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 $R_{\text { torroo }}$ allowing the heart's normal rhythm to be reestablished. (a) If the capacitor is initially uncharged with $C=8.00 \mu \mathrm{F}$ and $\boldsymbol{E}=1250 \mathrm{V}$ , find the value of $R$ required to charge the capacitor to a voltage of 775 $\mathrm{V}$ in 1.50 $\mathrm{s}$ . (b) If the capacitor is then discharged across the patient's torso with $R_{\text { toorso }}=1250 \Omega$ , calculate the voltage across the capacitor after 5.00 $\mathrm{ms} .$

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Video Transcript

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Top Physics 102 Electricity and Magnetism Educators
Elyse G.

Cornell University

LB
Liev B.

Numerade Educator

Marshall S.

University of Washington

Aspen F.

University of Sheffield

Physics 102 Electricity and Magnetism Bootcamp

Lectures

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