Question

Part B Constants Find the direction of the electric field in terms of a and the distance r from the axis of the tube for r<a A very long conducting tube (hollow cylinder) has inner radius a and outer radius b. It carries charge per unit length -a where a is a positive constant with units of C/m. A line of charge lies along the axis of the tube. The line of charge has charge per unit length ta parallel to tube's axis radially outward radially inward the field is zero Submit Part C

Answer 1

For r<a Electric field will be only due to positive charge placed along the axis. Charge on conductiong plate wont have any electric field for r<a.

So direction will be radially outward.

And magnitude=$\alpha$/(2$\pi\epsilon$₀r)