Particles A and B carrying charge 3.0nC are at the base corners of an equilateral triangle 2.8 m on a side
How much work is required to bring a positively charged particle carrying a charge of 5.0nC from infinity to the apex if particle B is replaced by a particle carrying a charge of - 3.0nC and A and B are fixed?
Then
Calculate the electric potential energy for the new triangular distribution?
1
Expert's answer
2021-10-14T11:31:31-0400
Calculate the potential at the apex from charges: of equal charge but opposite sign:
V1=−V2=∣kq/r∣,V=V1+V2=0.
Determine the work:
W=VQ=0.
The energy of the new triangular combination at the center of the triangle is
U=r23⋅kq1q2+r23⋅kq1q3+r23⋅kq3q2,U=−1⋅10−7 J.
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