Finding charge, voltage and resistance

[Kathi201]

A heart defibrillato passes a 12A current through a patient's torso for 3E-3 seconds to restore it to normal beating.
a. How much charge passed through the patient's body?
b. What voltage was used if a total energy of 300J was dissipated? by the current
c. What was the resistance of the path through the person?

For a I know that the current is I and I have the time and I need to figure out Q but I do not have any equations that have all three of those variables in it so I am stuck on what equation to even start with.

For b I am struggling with the same problem. I know that Voltage is equal to the current x resistance but I do not know where the energy comes into place

I know the resistance is the resistivity/A is A the area? How would I figure that out then?


Any help would be appreciated!

 

[alphysicist]

Hi Kathi201,

A heart defibrillato passes a 12A current through a patient's torso for 3E-3 seconds to restore it to normal beating.
a. How much charge passed through the patient's body?
b. What voltage was used if a total energy of 300J was dissipated? by the current
c. What was the resistance of the path through the person?

For a I know that the current is I and I have the time and I need to figure out Q but I do not have any equations that have all three of those variables in it so I am stuck on what equation to even start with.

What is the definition of current?

For b I am struggling with the same problem. I know that Voltage is equal to the current x resistance but I do not know where the energy comes into place

What quantity can you find from knowing the energy and the time? How is that related to voltage?

I know the resistance is the resistivity/A is A the area? How would I figure that out then?

Once you find the voltage in part b, what is the relationship between voltage and resistance?