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Q.

A ring of radius R is uniformly charged on its length with total charge ‘Q’ find the maximum electric field generated by the ring on axis: (Take k=14πε0)

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a

KQ(2R)2

b

2KQR2

c

KQ(2R)2

d

2KQ33R2

answer is C.

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Detailed Solution

Enet is at R2E=kQR22/2R2+R223/2E=kQR23R223/2=2kQ33R2

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