Q. Which of the following is false concerning a magnetic field in and around a hollow conductor as compared to that of a solid conductor of the same outside diameter when both are of the same magnetic material, and when the applied current is the same?

• (A) The field immediately outside the outer surface of the hollow conductor is greater
• (B) The field gradient inside the hollow conductor is steeper
• (C) The fields outside the conductors are the same
• (D) The fields are the same at the centre