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Q.

The electric field at 20 cm from the centre of a uniformly charged sphere of radius IO cm is E. Then at a distance 5 cm from the centre it will be :

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a

2E

b

16E

c

4E

d

Zero

answer is C.

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Detailed Solution

Eoutside=KQ(20)2=E ;  Eoutside=KQ(5)(10)3=2E

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