Homework Help: PHYS 1112

Posted by Diane on Thursday, February 11, 2010 at 2:06pm.

A defibrillator is used during a heart attack to restore the heart to its normal beating pattern. A defibrillator passes 18 A of current
through the torso of a person in 2.0 ms.

a) How much charge moves during this time?

b) How
many electrons pass through the wires connected to the patient?

PHYS 1112 - drwls, Thursday, February 11, 2010 at 2:14pm
Q = I*t, which means
(charge,coulombs)
= [current,amps)*(time,seconds)

Divide the Charge Q by the electron charge, e, to get the number of electrons.

Look up the electron charge if you don't know it. It is a number you should memorize. You should also memorize the formula.

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