The potential energy of a configuration of three charges is U. If every charge i
ID: 2108526 • Letter: T
Question
The potential energy of a configuration of three charges is U. If every charge in the configuration is doubled, the potential energy becomes
(1.) 2U
(2.) 3U
(3.) 4U
(4.) 6U
(5.) 9U
A charge q is moved a distance d from an initial point i to a final point f by an external agent. In the process, the agent does work W. Therefore the potential difference between points i and f is?
(1.) Vf - Vi = Wq/d
(2.) Vf - Vi = W/q
(3.) Vf - Vi = Wd/q
(4.)Vf - Vi = -W/q
(5.)Vf - Vi = - (-W)/d
Can you please show work?
My working for the first question was (4.) and for the second question was (4.)
Explanation / Answer
1)3=4U
2)4=W/q
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