Quiz_B - e) nowhere 2Q-For the net force to be zero, the...

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Physics 241 – Sample Quiz B – Jan. 8, 2008 Two point charges are separated by distance d as shown. Where can you put a third charge of 1 C so that there is no net electric force acting on it? (Take Q > 0.) a) to the right of charge -Q b) to the left of charge 2Q c) between the two charges d) some other place
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Unformatted text preview: e) nowhere 2Q-For the net force to be zero, the two contributions (from interacting with 2Q and with -Q) must exactly cancel. Since the 2Q charge is of bigger magnitude, the only place this can happen is to the right of -Q where -Q is closer to the third (test) charge than 2Q....
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This note was uploaded on 07/29/2008 for the course PHYS 241 taught by Professor Wei during the Spring '08 term at Purdue.

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