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CE-06-SS2005

# CE-06-SS2005 - CLASS EXERCISE#6(1 When two charges are...

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CLASS EXERCISE #6 - June 21, 2005 (1) When two charges are separated by 4.0 m, their electric potential energy is 12 J. What can you tell, if anything, about the signs of these two charges? Since the electric potential energy is positive, the two charges must have the same sign: they are both positive or both negative. If one were positive and the other negative, the electric potential energy would be negative. (2) What is their electric potential energy when they are moved to a separation of 3.0 m? The electric potential energy is proportional to 1 . since 3.0 m is 0.75 times Î< < œ as large as 4.0 m, the electric potential energy at 3.0 m must be < œ < œ 1/0.75 4/3 as large as it is at 4.0 m. That means the electric potential energy
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