Question

An infinitely long thin straight wire has uniform linear charge density of 1/3 coul.m^–2. Then the magnitude of the electric intensity at a point 18 cm away is : (given ∈0=(8.0×10^-12C²/N^-m2)

1) 0.33×10¹¹ NC^-1

2) 3×10¹¹NC^-1

3) 0.66×10¹¹ NC⁻¹

4) 1.32 ×10¹¹ NC⁻¹

Answer 1

Correct Option: 1) 0.33×10¹¹ NC^-1

Explanation : Magnitude of electric intensity at a point due to an infinitely long thin straight wire of uniform linear charge density λ is