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phys#7 - Erica Broome Phys104 HW#7 32 Without a circuit...

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Erica Broome Phys104 4/9/09 HW #7 32. Without a circuit, charge can’t flow continuously through the lamp, so no current flows through the lamp and it remains dark. 36. The battery’s store of chemical potential energy will increase, because the positive charge will flow backward through the battery and drive its electrochemical processes backward. And therefore the battery will recharge. 40. Current flows from the battery’s positive terminal, through the hobbyist’s tongue, to the battery’s negative terminal, so energy is being transferred from the battery to the hobbyist’s tongue by the current. 42. The filament’s larger resistance ensures that it experiences the main voltage drop and receives most of the current’s electrical power. 4. The button magnet’s magnetic field magnetically polarizes the iron pipe, and the pipe develops an opposite pole near the pole of the approaching button magnet and then attracts that magnet.
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