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A clock battery wears out after moving 10,000 C of charge through the clock at a rate of 0.500 mA. (a) How long did the clock run? (b) How many electrons per second flowed?
(a) $\Delta t=231$ days(b) $n=3.13 \times 10^{15}$ electron
Physics 102 Electricity and Magnetism
Chapter 20
Electric Current, Resistance, and Ohm's Law
Current, Resistance, and Electromotive Force
University of Washington
Hope College
University of Winnipeg
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So in this problem, we know that Ah ah, for this Coke. So there is totally Q equal. 10,000 columns flowing through. And, ah, the current is the, uh uh, 0.5 medium peers. So we camped in that I call Q. This is Derek. You that a Q over devotee. So we can see that that a c equal that a Q over I write. So we simply need to use this data cue over this current, and this gives you two times 10 to the seven seconds or you be transferring to ours. So this will give you 5500 hours and the in part B. We want to know how many electrons will flow through ah, each second. So we know that the current is two point 5,000,000 peers that so that means a H second, there will be 25 made it cool. Me's going through the cock. So 0.5 make homes to buy by the charge of intellectual. So that is 1.6 times 10 to the negative 19. Cool. Um, so this gives you three points 1 to 5 times turned to the 15th electrons. So each second there will be 3.1 to 5 times into the 15 electrons flowing through the cock
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