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    Engineering Basic Circuits Question

    Just like summing up forces and torques, you are supposed to arbitrarily guess a direction for each current and be consistent with it. If the math gives you a negative answer, then you know the current actually flows in the opposite direction
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    How does a battery loose its charge?

    Different batteriees behave differently. Some batteries must be drained all the way before recharging. If you dont, it will hold less of a charge next time. The lithium batteries in ipods and cell phones dont have these problems. They do, however, have a definite shelf life and will eventually...
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