Resultant magnetic field?

Question

Two straight parallel wires are 10 cm apart. A current of 5 A passes through one wire and 6 A through the other wire. Find the resultant magnetic field at a point midway between the wires.

a. When the currents are in the same direction

b. When the currents are in the opposite direction

Answer 1

The magnetic field at a distance away from a long wire is given by:

B = µ₀I / 2πr

Using that formula, calculate the magnetic field at a distance 0.05 m away from each wire and then calculate the resultant.