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Internal resistance of cells.
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| Submitted: Mon Aug 18 2003
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Internal resistance of cells. Plan: Introduction: A toy manufacturing company has received complaints about a battery driven toy car. Apparently after only a few hours use the toy car's batteries need replacing. The customers are unsatisfied with the toy car and want their money back, the toy company believes that the short life span of the battery is not down to the toy car being faulty but that modern batteries have a high internal resistance, which causes poor performance. It is our job to see if this in fact the case. The internal resistance of a battery can be related to the current, resistance of an external load and emf (electromotive force) by Ohms law: Where IR is the terminal pd and Ir is the pd across the internal resistance, by also considering the equation V = IR we can substitute this in to produce: With this equation we can arrange it in The form y =...
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