Calculate the electric potential at point P located at the centre of the square of side 1.3 m with point charges as shown. Q1=12 nC, Q2=-24 nC, Q3=31 nC, Q4=17 nC,r=1.3m. (nC is nano coloumb=10^-9 C)

Dear Student ,
Here in this case , side=a=1·3 mNow potential at the centre of the square =V=qa2=2qaSo the total potential at the centre is ,V=V1+V2+V3+V4=2Q1a+2Q2a+2Q3a+2Q4a=2aQ1+Q2+Q3+Q4=21·312-24+31+17×10-9=3·916×10-8 V

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