Question 1.23)

An infinite line charge produces a field of 9 × 104 N/C at a distance of 2 cm. Calculate the linear charge density.


The electric field produced by the infinite line charges at a distance d having linear charge density λ:

E=λ2πε0dλ=2πε0dE

λ=0.02×9×1042×9×109=10μC/m

The linear charge density is 10 μC/m.