Q.

A thin conducting ring of radius R is given a charge +Q. The electric field at the centre O of the ring due to the charge on the part AKB of C the ring is E. The electric field at the centre due to the charge on the part ACDB of the ring, (Fig. 2.101) is : 

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a

3 E along OK

b

3 E along KO

c

E along OK 

d

E along KO

answer is C.

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Detailed Solution

Net electric field at O is zero. 

So required electric field is E towards OK.

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