A 11.6 uF capacitor in a heart defibrillator unit ischarged fully by a 10500 V p

Question

A 11.6 uF capacitor in a heart defibrillator unit ischarged fully by a 10500 V power supply. Each capacitor plateis connected to the chest of a patient by wires and flat "paddles,"one on either side of the heart. The energy stored in the capacitoris delivered through an RC circuit, where R is the resistance ofthe body between the two paddles. Data indicate that it takes75.0 ms for the voltage to drop to 20.5 V. Find the time constant. ms Determine the resistance, R. k A 11.6 uF capacitor in a heart defibrillator unit ischarged fully by a 10500 V power supply. Each capacitor plateis connected to the chest of a patient by wires and flat "paddles,"one on either side of the heart. The energy stored in the capacitoris delivered through an RC circuit, where R is the resistance ofthe body between the two paddles. Data indicate that it takes75.0 ms for the voltage to drop to 20.5 V. Find the time constant. ms Determine the resistance, R. k

Explanation / Answer

Capacitance C = 11.6 * 10 ^ -6 F

Maximum voltage V = 10500 V

Time t= 75 ms = 0.075 s

Voltage after time t is V ’ = 20.5 V

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