Q2) a point charge Q=40nc at (0,y,0) and a two infinte lines charge the first at y=0, z=0 have pL1=10 nc/m and the second at x= 0, y=0 have pL2=20 nc/m. find the (y) location of point charge such that the electric field intensity at (0, 4, 0) is zero:
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