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botanzee
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Homework Statement
i have to do a scientific research about finding the best batteries specifications. for this case the battery should last long as possible . there are 3 characteristics : Voltage , Capacity and inner resistance .
i have measured voltage over the time. when i used smaller resistances the voltage decreases faster. why?
when i first plug in the battery the change is significant. why it happens this way? i searched the internet and find out duracell's discharge graph. in their graph also the first change is significant.
i used a 9v battery and measured it until the voltage is decreased to 7.9 and then i unplugged it. after a while i did the same measurement again (but with different voltmeters) and saw that the initial voltage was 8.6? how can this happen? or is it a meaurement problem?
I found that a formula , known as Peukert's Law. this law is used to calculate the discharge time but i didnt get the rated and the actual thing.
Thank you for everything:)