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Q.

At a point 20 cm from the centre of a uniformly charged hollow sphere of radius 10 cm, the electric field is 100 V /m. The electric field at 3 cm from the centre of the sphere will be

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a

125 V/m

b

150 V/m

c

Zero

d

120 V/m

answer is D.

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Detailed Solution

Electric field outside of the sphere, Eout=kQr2   .   .   .   i

Electric field inside the hollow sphere is zero.

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