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chapter42 electric potenial

# chapter42 electric potenial - ?Which of the following is...

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4  . Which of the following is true about the electrical circuit in your flashlight ? a. Charge moves around the circuit very fast - nearly as fast as the speed of light  . b. The battery supplies the charge (electrons) that moves through the wires . c. The battery supplies the charge (protons) that moves through the wires . d. The charge becomes used up as it passes through the light bulb . e. The battery supplies energy that raises charge from low to high voltage . f. . .. nonsense! None of these are true . Answer: E As emphasized on this page, the battery supplies the energy to move the charge through the battery, thus establishing and maintaining an electric potential difference. The battery does not supply electrons nor protons to the circuit; those are already present in the atoms of the conducting material. In fact, there would be no need to even supply charge at all since charge does not get used up in an electric circuit; only energy is used up in an electric circuit . 5  . If a battery provides a high voltage, it can .____  a. do a lot of work over the course of its lifetime   b. do a lot of work on each charge it encounters c. push a lot of charge through a circuit d. last a long time Answer: B The electric potential difference or voltage of a battery is the potential energy difference across its terminals for every Coulomb of charge. A high voltage battery

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chapter42 electric potenial - ?Which of the following is...

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