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[" 1.The surface charge density of a thi...

[" 1.The surface charge density of a thin charged disc of radius "],[" R is "sigma" .The value of the electric field at the centre of the disc "],[" is "(sigma)/(2 epsilon_(0))." With respect to the field at the centre,the electric "],[" field along the axis at a distance "R" from the centre of the disc "],[" reduces by "],[[" (a) "70.7%," (b) "29.3%," (c) "9.7%," (d) "14.6%]]

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