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MHT CET Physics question

PhysicsElectric Charges and FieldsMHT CET

An infinite line charge produces a field of at a distance 2 m from it. The linear charge density is

Answer: (A)

Solution

gives \dfrac{Er}{2k}\dfrac{4.5×10^4×2}{2×9×10^9}$=5×1

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Question ID VK-075663