Defibrillator Energy Dissipation Calculation

[phy112]

Homework Statement

A defibrillator passes a brief burst of current through the heart to restore normal beating. In one such defibrillator, a 40.0 µF capacitor is charged to 6.2 kV. Paddles are used to make an electrical connection to the patient's chest. A pulse of current lasting 1.0 ms partially discharges the capacitor through the patient. The electrical resistance of the patient (from paddle to paddle) is 230 .
I found these calculations:

initial energy stored in the capacitor is 768.8J
initial current through the patient is 26.96A

I need to know How much energy is dissipated in the patient during the 1.0 ms?

Homework Equations

The Attempt at a Solution

 

[dsptl]

any attempts?

 

[dsptl]

Try this if ur given values 768.8J and 26.96 are right:


• Charge remaining after t s., Q = CV e^ -[1/CR]t


• Energy lost = 768 – Q^2 / 2C