PURPOSE: To show the field inside, outside, and at the ends of a long solenoid.
DESCRIPTION: A long solenoid is supplied with a DC current and is probed with a Hall probe, as shown in the above left photo. Use an axial probe to investigate the field inside the solenoid, as shown below left, and show that it is uniform in magnitude and direction. Probe the field outside the solenoid, as shown below right, and show there is no B field.
Another long solenoid is placed onto the overhead and powered by a power supply. A clear magnetic compass is used to probe the magnetic field at the end of the solenoid.
EQUIPMENT: The coil and magnetic compass are stored in the electricity and magnetism cabinet, the Hall Probe is borrowed from the 2nd floor labs. Be sure to get the axial probe and the F.W. Bell model 620 Gaussmeter.
SETUP NOTES: Use either the VOM meter or the electrometer to display the hall measurement to the class.
Here is some info in pdf format about the hall probe: halleffect.pdf