An infinitely long cylindrical conductor with radius R = 1.30 cm carries a current 2.80 A which is uniformly distributed over the cross-sectional area of the conductor. What is the magnitude of the magnetic field, in units of ĢT, at a distance R/2 from the conductor axis? (Take ĢĢā = 4ĢĢ Ģ 10ā»ā· T Ģ m/A.)
21.5
21.7
12.4
20.7
20.9