Two straight infinitely long and thin parallel wires are spaced 0.1m apart and carry a current of 10A each. Find the magnetic field at a point distance 0.1m from both wires in the two cases when the currents are in the (a) same and (b) opposite directions.

Answer

[(a) `3.46 xx 10^(-5)T`; (b) `2 xx 10^(-5)T`]