Conduct a quantitative investigation to demonstrate the interaction between two parallel current carrying wires

Analyse the interaction between two parallel current-carrying wires and determine the relationship between the International System of Units (SI) definition of an ampere and Newtonβs Third Law of Motion

Learn.

As we saw in the πΉ = ππΌπ΅sinπ lesson, a current carrying conductor creates a magnetic field when a charge is passed through it. Therefore, you would expect that putting two current carrying conductors together, we would expect to see the wires attract or repel one another. If the current’s are running in the same direction the wires will be attracted together. If they run in opposite directions the wire will be repelled apart.

We can use our right hand to predict the magnetic field around a wire. Our thumb points in the direction of conventional current, from positive to negative. The way our fingers wrap around the wire is the direction the magnetic field goes around the current carrying conductor.

We can use the following formula to predict the strength of the force acting on the wires.