Faraday’s Law

PHY 2049

Faraday’s Law

1) ABSTRACT: Relative motion between a magnetic field and a conductor are needed to create a voltage within the conductor. For current to flow the conductor must be a complete loop, if not the current will not flow.

2) THEORY: Faraday’s Law ( V = -N(Df/Dt) )

3) PROCEDURE:

A. A coil is connected to a galvanometer, completing the loop. A magnet is passed through the coil.

B. A coil is connected to a galvanometer, completing the loop. Many magnets are passed through the coil.

C. Two coils are placed end to end with an iron rod placed through them. One is connected to a galvanometer the other to a power supply. The power supply is switched on and off.

D. A large coil surrounding an iron rod is given a constant current. An aluminum ring with a slit to prevent complete current is placed over the rod.

E. A large coil surrounding an iron rod is given a constant current. A complete aluminum ring is placed over it.

F. A large coil surrounding an iron rod is given a constant current. A copper coil is placed over the rod, but is not a complete loop. The coil is then closed to complete the loop.

4) DATA AND RESULTS:

A. As the magnet passed through the coil a voltage was generated.

B. As many magnets passed through the coil a lower voltage was generated.

C. As current is supplied to the coil a voltage is generated in the iron rod.