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Q.

A charge Q1 is placed at O inside a hollow conducting sphere having inner and  outer radii as 10 m and 11 m as shown. The force experienced by Q2 at P is F1 and force experienced by Q2  when  Q1 is placed at O1  is  F2.  Then F1/F2 is equal to

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a

1

b

(1213)2

c

(1312)2

d

none of these

answer is A.

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Detailed Solution

Force on Q2 will be due to induced charge on outer surface only which will be same in both cases along with its distribution. Hence the ratio is 1.
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