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CBSE Class 12-science Answered

Find the potential at the center of the square having charges of 2nC,1nC,-2nC,3nC at the four corners, side of the square is root2 m.
Asked by lekhakarthikeyan | 10 Apr, 2018, 01:27: AM
answered-by-expert Expert Answer
 
As shown in figure all charges are placed at a distance of 1m from centre of square.
Potential due to +2 nC and -2 nC cancel each other. Hence net potential is given by

begin mathsize 12px style V space equals space fraction numerator 3 q over denominator 4 pi epsilon subscript 0 end fraction plus space fraction numerator q over denominator 4 pi epsilon subscript 0 end fraction space equals space space fraction numerator 4 q over denominator 4 pi epsilon subscript 0 end fraction equals space fraction numerator q over denominator pi epsilon subscript 0 end fraction space semicolon space w h e r e space q space equals space 1 space n C H e n c e space n e t space p o t e n t i a l space V space equals space fraction numerator 10 to the power of negative 9 end exponent over denominator pi epsilon subscript 0 end fraction space V o l t end style

Answered by Thiyagarajan K | 10 Apr, 2018, 03:03: PM

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