An infinitely long thin straight wire has uniform charge density of 14 10^-2 Cm^-1. What is the magnitude of electric field at a distance 20 cm from the axis of the wire?

Question

Accepted Answer

Correct answer: A. (a) Given: = 14 10^-2Cm^-1 x=20 cm=20 10^-2 m From Gauss law, electric field due to an infinitely long wire, E= 12 _0 x= 24 _0 x or E=2 9 10^9 14 10^-2 120 10^-2 or E=0.225 10^9 ∴ E=2.25 10^8 NC^-1

$An infinitely long thin straight wire has uniform charge density of \frac{1}{4} \times 10^{- 2} Cm^{- 1} . What is the magnitude of electric field at a distance 20 cm from the axis of the wire?$

Solution

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