A long straight wire carries 2.7A along the +x-axis.
1. Discover the magnitude of the magnetic field at a point 20cm away on the +y-axis.
2. Find the direction of the magnetic field at a point 20cm away on the +y-axis.
3. Discover the magnitude of the magnetic field at a point 20cm away on the -y-axis.
4. Discover the direction of the magnetic field at a point 20cm away on the -y-axis.