Experiment: EMF from Moving Wires in a Magnetic Field

[alva]

The attached drawing represents 4 wires. The top and down are still. The right and left move with the same velocity v as shown by the arrows.

There is a magnetic field perpendicular to the page.

Will there be a current flowing through the circuit formed by the 4 wires?

 

[alva]

The drawing is here, I expect.

View attachment loop.bmp

 

[Dale]

Yes. Each will get an EMF in the opposite direction, leading to a current loop.

 

[Philip Wood]

Another way of looking at it is that the area of the circuit is shrinking, and so, therefore, is the magnetic flux, B.A, linking the circuit.

 

[PJC01]

Based on the experiment described, there will most likely be a current flowing through the circuit formed by the 4 wires. This is because the movement of the wires in the magnetic field will induce an electromotive force (EMF) according to Faraday's law of induction. The changing magnetic field caused by the movement of the wires will create an electric field, which will result in a current flowing through the circuit. The direction and magnitude of the current will depend on the velocity of the wires and the strength of the magnetic field. This experiment could be further investigated by varying the velocity and magnetic field strength to observe the effects on the induced current. Additionally, the orientation of the wires and magnetic field could also be changed to see how it affects the current. Overall, this experiment demonstrates the important relationship between electricity and magnetism and how they can interact to produce a current.