Two point charges (+10nC and -10nC) are located 8cm apart. What is the electric potential energy when a point charge of -4.2nC is placed at points a,b, and c in turn?
Let U=0 when the -4.2nC charge is far away (but the other two are still in place).
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Two point charges (+10nC and -10nC) are located 8cm apart. What is the electric potential energy when a point charge of -4.2nC is placed at points a,b, and c in turn?
Let U=0 when the -4.2nC charge is far away (but the other two are still in place).
U=k* [((q1*q3)/r) + ((q3*q2)/r2)] --> = 8.99*10^-9[((-4.2*10^-9 X 10*10^-9)/0.04m) + ((-4.2*10^-9 X -10*10^-9)/0.12m)]
=-6.29uJ
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