Question

A long cylindrical volume contains a uniformly distributed charge of density ρ cm–3.
The electric field inside the cylindrical volume at a distance $x=\frac{2ε_0}{ρ} m$ from its axis is _______ Vm–1

Fig.

Answer 1

The correct answer is 1
$E=\frac{ρr}{2ε_0}$
at $r=\frac{2ε_0}{ρ}$
$E=\frac{ρ}{2ε_0}(\frac{2ε_0}{ρ})=1$