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A very long uniformly charged cylinder (...

A very long uniformly charged cylinder (radius R) has a surface charge density `sigma` . A very long uniformaly charged line charge( linear charge density `lambda`) is placed along the ctlinder axis. If electric field intensity vector outside the cylinder is zerom then :

A

`lambda=Rsigma`

B

`lambda=-Rsigma`

C

`lambda=2piRsigma`

D

`lambda=-2piRsigma`

Text Solution

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The correct Answer is:
d
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