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The surface charge density of a thin cha...

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)/(2in_(o))`. 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

reduces by 70.7%

B

reduces by 29.3%

C

reduces by 9.7%

D

reduces by 14.6%

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The correct Answer is:
A
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