In which case must an external source provide energy? (1) Take electrons out of

Question

In which case must an external source provide energy? (1) Take electrons out of a positively charged body (2) Forcing electrons into a negatively charged body (3) moving electrons out of a negatively What happens to the energy spent when moving electrons from another? Energy was stored as electric potential energy by moving 1,000 electrons from terminal A to terminal B. Which terminal has a positive charge? Which terminal has the larger charge in magnitude? Given two oppositely charged spheres When a conducting wire connects them electrons "fall" spontaneously (without being "pushed") from the negatively charged sphere to the positively charged sphere. What happens to the energy stored in the charged spheres? Consider two spheres or two "terminals" that have a "potential difference" between them Explain what the term "potential difference" means in terms of energy Consider two spheres or two "terminal" that have a certain potential difference between them How much energy is released if we double the quantity of electrons that falls from the negative terminal to the positive terminal? half the amount the same amount double the amount square root of the amount square the amount Consider two spheres or two "terminal" that have a certain potential difference between them How much energy is released if we double the potential difference for the same quantity of electrons that falls from the negative terminal to the positive terminal? half the amount the same amount double the amount square root of the amount square the amount Consider two spheres or two terminals that have a potential difference between them What units do we use to measure the quantity of electrons that falls from the negative terminal to the positive terminal? Consider two spheres or two "terminals" that have a certain potential difference between them What units do we use to measure the potential difference between them? joules, symbol J newtons, symbol N electrons, symbol e volts, symbol V coulombs, symbol C. Consider two terminals that have a potential difference between them What is the mathematical relation for the quantity of the energy W released by Q coulombs as they fall across a potential difference of V volts? W = FQ W = QV V = QW Q = WV SABIS Proprietary

Explanation / Answer

By the property that like charges repel each other and unlike charges attract each other

In first and second case electron is forced to negative charged body, and separated from positive charged body, in both the cases charged is moved in opposite direction of the force then external energy is required

In third of the cases force is of attractive kind so no external work or energy is required.

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