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CBSE Class 12-science Answered

Calculate  the  electrostatic  potential  energy for  a  system  of  three  point  charges placed  at  corners of  an  equilateral  triangle  of  side 'a'
Asked by pardeepkumar2281 | 09 May, 2018, 11:11: PM
answered-by-expert Expert Answer

Let q0 be the original charge present initially at one of the vertex of equilateral triangle.
To bring the charge q1 at another vertex the required workdone is given by
 
W1 = q0×q1/(4πε0×a)
 
To bring the charge q2 at third vertex the required workdone is given by
 
W2 = [ q0×q2/(4πε0×a) ]+[ q1×q2/(4πε0×a) ]
 
Total workdone W1+W2 = [1/(4πε0×a)] × [ q0×q1 + q0×q2 + q1×q2 ] Joules
 
potential energy is same as the workdone W1+W2
Answered by Thiyagarajan K | 10 May, 2018, 11:17: AM

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