A long, cylindrical conductor of radius a has two cylindrical cavities each of diameter a through its entire length. A current I is directed out of the page and is uniform through a cross section of the conducting material. Find the magnitude and direction of the magnetic field in terms of µo, I,r and a at • point P1 • point P2 a P2 а r

A long, cylindrical conductor of radius a has two cylindrical cavities each of diameter a through its entire length. A current I is directed out of the page and is uniform through a cross section of the conducting material. Find the magnitude and direction of the magnetic field in terms of µo, I,r and a at • point P1 • point P2 a P2 а r