uConsider the cylindrical conductor with a hollow center and copper walls of thickness ba as shown. The radii of the inner and outer walls are a and brespectively, and the current I is uniformly spread over the cross section of the copper (shaded region). What is the magnitude of the magnetic field in units of nT at r 24.3cm a= 11.8cm, b 32.3cm, I 242mA. Ho-4m x 107 Tm/A Provide your answer with two decimal places. 01 (out of page) Do