We will observe the interaction between electric current and magnet (compass)!
I use an adjustable intensity generator designed to work in cct. The compass indicates the North
At closing: 0.23 Amperes, a slight deviation is observed
By increasing the intensity, the deviation of the needle increases
At 12 A, one approaches 90 ° (unattainable value because more attraction to 90 °)
The compass suffers a magnetic field due to the flow of electric current
Indeed, copper does not influence the compass, except when the current flows!
The sending of pulses demonstrates the power of the magnetic field induced in a conductor subjected to an electric current!