Final answer:
The electric field inside an infinite conducting cylindrical shell is zero at all points.
Step-by-step explanation:
The problem states that we have an infinite conducting cylindrical shell with a radius of 0.45 m and a surface charge density of 2.6 μC/m². To find the electric field inside the shell, we can use Gauss' Law. Since the shell is infinite, the electric field inside the shell is always zero. This is because any field produced by positive charges on one side of the shell is cancelled out by the field produced by negative charges on the other side. Therefore, the electric field inside the cylindrical shell is zero at all points.