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A charged cylindrical conductor of infin...

A charged cylindrical conductor of infinite length has charge per unit length of `10muC//m`. The electric intensity at a point at a distance of 20 cm from its axis in the surrounding medium is `2.5xx10^(5)N//C`. The relative permittivity of the surrounding medium is

A

3.6

B

2.6

C

4.6

D

`3.0`

Text Solution

Verified by Experts

The correct Answer is:
A
`E=1/(4piepsi_(0)k)(2q)/r" "thereforek=1/(4piepsi_(0))(2q)/(Er)`
`=(9xx10^(9)xx2xx10xx10^(-6))/(2.5xx10^(5)xx0.2)=3.6.`
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