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An infinite line charge produces a field...

An infinite line charge produces a field of `9xx10^(4) NC` at a distance of 2cm. Calculate the linear charge density.

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Here, `E = 9xx10^(4) N//C, r = 2cm = 2xx10^(-2) =m, lambda = ?`
As `E = (lambda)/(2pi in_(0) r) :. lambda = 2pi in_(0)r E = (1)/(2xx9xx10^(9)) xx10^(-2)xx9xx10^(4) = 10^(-7) C m^(-1)`
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