I'm kinda stuck on this question: 1. Calculate the magnitude ofthe magnetic f ield at a point midway between two long, parallel wires that are 1 .0 m apar t and have currents of1 0.0 A and 20.0 A, respectively, ifthe currents are (a) in opposite directions and (b) in the same direction. The answer is (a) 1.2 x 10^-5 T (b) 4.0 x 10^-6 T 2. Also, this question (i thought it was easy, but i kept on getting 4.0 x 10^-5, but the answer is 1.0 x 10^-5). A long, solid, copper rod has a circular cross-section ofdiameter 10.0 cm. The rod has a current of5.0 A, uniformly distributed across its cross-section. Calculate the magnetic field strength 2.5cm from the centre of the rod. P.S. At this point, the only equation i am using is B = (mew)oI 2(pi)r Where (mew)o is the is a proportionality constant,called the permeability of free space.