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An infinitely long thin straight wire ha...

An infinitely long thin straight wire has uniform linear charge density of `1//3 "coul" m^(-1)` .Then the magnitude of the electric intensity at a point `18cm` away is

A

`0.33 xx10^(11) NC^(-1)`

B

`3 xx10^(11) NC^(-1)`

C

`0.66 xx10^(11) NC^(-1)`

D

`1.32 xx10^(11) NC^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
`lamda =1/3 Cm^(-1)`
r = 18cm = 0.18m
`E=lamda/(2piepsilon_0r)=(2xx1/3 xx9 xx10^9)/(0.18)=0.33 xx10^(11)N//C`
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