Defibrillator Energy Dissipation Calculation

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In summary, A defibrillator uses a 40.0 µF capacitor charged to 6.2 kV to pass a brief burst of current through the heart, restoring normal beating. The patient's electrical resistance is 230 Ω and a pulse of current lasting 1.0 ms partially discharges the capacitor. Using the given values of 768.8J and 26.96A, it can be calculated that the initial energy stored in the capacitor is 768.8J and the initial current through the patient is 26.96A. To find the energy dissipated in the patient during the 1.0 ms, the equations Q = CV e^ -[1/CR]t and Energy lost =
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phy112
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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

 
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  • #2
any attempts?
 
  • #3
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
 

FAQ: Defibrillator Energy Dissipation Calculation

1. What is energy dissipation?

Energy dissipation refers to the process in which energy is transformed from one form to another and becomes less available for use. This can occur in many different systems, such as mechanical systems, electrical circuits, and chemical reactions.

2. How does energy dissipate?

Energy can dissipate in various ways, such as heat transfer through conduction, convection, or radiation, frictional forces, or through electrical resistance. In general, energy dissipates when it is converted into a different form that is not as easily usable.

3. Why is energy dissipation important to understand?

Understanding energy dissipation is important in many fields of science and engineering. It helps to explain how different systems behave and how energy is conserved and transformed. It is also crucial in designing efficient and sustainable systems.

4. Can energy be dissipated completely?

In most cases, energy cannot be dissipated completely. The laws of thermodynamics state that energy cannot be created or destroyed, only transformed. However, it can be dissipated to the point where it becomes unusable for practical purposes.

5. How can energy dissipation be minimized?

Energy dissipation can be minimized by reducing friction and resistance in a system, using more efficient materials and designs, and optimizing processes to minimize energy losses. It is also important to use energy sources that are renewable and sustainable to reduce overall energy dissipation in the long term.

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