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A rod of length 2.4 m and radius 4.6 mm ...

A rod of length 2.4 m and radius 4.6 mm carries a negative charge of `4.2xx10^(-7)`C spread uniformly over it surface. The electric field near the mid-point of the rod, at a point on its surface is

A

` –8.6 xx 10^(5) N C^(–1)`

B

`8.6 xx 10^(4) N C^(–1)`

C

`-6.7 xx10^(5)N C^(–1)`

D

` 6.7 xx 10^(4) N C^(–1)`

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