TS EAMCET Medical 8 May 2019 Shift 1 Paper

Consider three coaxial cylinders of infinite length. The inner cylinder carries current of 3 A in the upward direction. The middle cylinder carries a current 5 A in the downward direction and the outer cylinder carries a current of 8 A in the upward direction. The magnitude of magnetic field 10 cm away from the common central axis of the three cylinders is