two point charges q1 nad q2 are placed at a distance r1 and r2 respectively in an external electric field . obtain an expression for total work done in assembling this configuration?

Asked by vasturushi | 25th Dec, 2017, 07:05: PM

Expert Answer:

Work-done to bring a charge q1 in the electric field at a distance r1 =q1V(r2)
 
 
Work-done to bring a charge q2  in the electric field at a distance r2 =  q2V(r2)
 
Work-done on q2 to move it against the force of charge q1
 
 begin mathsize 16px style equals space fraction numerator 1 over denominator 4 pi element of subscript 0 end fraction fraction numerator q subscript 1 q subscript 2 over denominator r subscript 12 end fraction end style
 
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Answered by Gajendra | 27th Dec, 2017, 04:16: PM