1.

Electric field produced due to an infinitely long straight uniformly charged wire at perpendicular distance of 2 cm is 3 xx 10^8 NC^(-1). Then linear charge density on the wire is.......

Answer»

`333 (muC)/m`
`666 (muC)/m`
`3.33 (muC)/m`
`6.66 (muC)/m`

SOLUTION :`E = LAMBDA/(2piE_(0)r) = (2lambda)/(4piE_(0)r) =(2klambda)/r`
`lambda =(Er)/(2k) =(3 xx 10^(8) xx 0.02)/(2 xx 9 xx 10^(9))`
`therefore lambda =3.33 xx 10^(-6)`
`therefore lambda =333 (muC)/m`


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