A long, straight, thin walled cylindrical shell having radius R carries a current I parallel to the central axis of the shell in positive x-axis direction.
i) Evaluate the magnetic field (comprising direction - as seen from the negative x-axis) within the shell. (Use the given as required: µ0, I, p and r.)
ii) Determine the magnetic field (comprising direction - as seen from the negative x-axis) outside the shell. (Use the given as required: µ0, I, p, and r.)