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Q.

An infinite line charge produces a field of  18×103  N/C at a distance of 1m. The linear charge density is

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a

2×10−6C/m

b

10−6C/m

c

10C/m

d

10−12C/m

answer is B.

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Detailed Solution

E=12πε0λr⇒18×103=18×109×λ1

λ=10−6Cm−1

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