An isolated conducting ring of radius R is given a charge +Q. The electric field at centre O of the ring due to the charge on part AKB of the ring is E. The electric field at centre O due to charge on part ACDB of the ring is: [Diagram: Image]
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Question

An isolated conducting ring of radius R is given a charge +Q. The electric field at centre O of the ring due to the charge on part AKB of the ring is E. The electric field at centre O due to charge on part ACDB of the ring is: [Diagram: Image]

Options

G1 Physics · Accepted Answer

Step 1: Electric field at centre of complete uniformly charged ring is zero by symmetry. Step 2: Contributions of arc AKB and remaining arc ACDB are equal in magnitude and opposite in direction. Step 3: The original arc AKB generates E along KO; remaining arc generates E along OK. So answer E along OK.