Two point charges A and B of values +15 uC and +9 uC are kept 18cm apart in air. Calculate the work done when charges B is moved by 3cm towards A. Share with your friends Share 0 Vaibhav Tiwari answered this Solution : Ui=Kq1q2r1Ui=9×109×15×10-6×9×10-618×10-2Uf=Kq1q2r2Uf=9×109×15×10-6×9×10-615×10-2Work done, W=∆U=Uf-UiW=9×109×15×10-6×9×10-615×10-2-9×109×15×10-6×9×10-618×10-2W=9×109×15×10-6×9×10-610-2115-118W=9×10-1×15×9×18-1515×18=1.35 J 0 View Full Answer
