Greentea Posted May 18, 2011 Report Share Posted May 18, 2011 Hello guysIm currently doing a IA on calculating the internal resistance in the battery, and got stuck on the improvements. During the lab the only major problem was the chemical reaction of the battery - polarization, voltage was reducing. I've been trying to think what could I suggest to improve. My teacher gave me a clue, comparing a battery to a human, that if you break your leg when you play football, on the next day you wont be able to do that, but after few months your leg will recover, and you will be able to play. I just cant link his clue to the polarization of the battery in the lab.Please help! Reply Link to post Share on other sites More sharing options...
Drake Glau Posted May 19, 2011 Report Share Posted May 19, 2011 Let the battery sit? That's what I got out of it...You could have also just had a constant power source like a DC power supply, or something of the sort... Reply Link to post Share on other sites More sharing options...
Greentea Posted May 19, 2011 Author Report Share Posted May 19, 2011 Thanks for replying!Could you please explain what do you mean by letting the battery sit? Reply Link to post Share on other sites More sharing options...
Drake Glau Posted May 20, 2011 Report Share Posted May 20, 2011 I have no idea That's what I got out of your teacher's advice lol Although letting the battery sit could allow it to reach ion equilibrium of the redox reaction going on inside. Using the battery is still taking some electrons so actually using the battery could possibly cause the overall charges of the two parts of the voltaic cell to alter and thus that would alter your voltage. Reply Link to post Share on other sites More sharing options...
Rigel Posted May 20, 2011 Report Share Posted May 20, 2011 I'm not doing this topic this year, doing it on IB2, but i guess i can help (I'll do my best).You can possibly add that the room's/lab's temperature was fluctuating a lot. (Something like that happpened in a Mechanics IA, where the temperature of the room greatly affected the experiment). Reply Link to post Share on other sites More sharing options...
Drake Glau Posted May 20, 2011 Report Share Posted May 20, 2011 Resistance wouldn't change too much with only the normal fluctuation of the room. At least I don't think it would change THAT much...but I could be wrong, temperature increases will lower resistance and vise versa =/ Reply Link to post Share on other sites More sharing options...
Rigel Posted May 20, 2011 Report Share Posted May 20, 2011 Resistance wouldn't change too much with only the normal fluctuation of the room. At least I don't think it would change THAT much...but I could be wrong, temperature increases will lower resistance and vise versa =/ I'm not sure, but here in Lima, Perú, the weather is impossible to predict. That day the morning was freezing, and at noon the climate was extremely hot. Reply Link to post Share on other sites More sharing options...
Drake Glau Posted May 20, 2011 Report Share Posted May 20, 2011 Yes well, that's extreme...wow lolYea, that would cause problems I think. Reply Link to post Share on other sites More sharing options...
Rigel Posted May 20, 2011 Report Share Posted May 20, 2011 You can also add something related to the magnetic field, or the calibration/error of the instrument. Reply Link to post Share on other sites More sharing options...
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