The linear charge density of four quadrants of a ring of radius R is as shown. Electric field at the centre will be :
Zero
2√KλR
4√2KλR
4KλR
A
Zero
B
4√2KλR
C
4KλR
D
2√KλR
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Solution
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Field due to a semicircular uniform charge is 2KλR Thus field at center due this configuration is 4KλR
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