Categories |
---|
Mechanics |
Fluid Mechanics |
Oscillation and Waves |
Thermodynamics |
Electricity and Magnetism |
Optics |
Modern Physics |
Astronomy |
Images |
---|
[Setup Time: 5 Min.] [Current Condition: Good]
A beam of electrons in bent in a circle by large Helmholtz coils.
1. Attach the various power supplies and meters as shown in the diagram, noting that the connection to the regulated power supply should be connected to on the high voltage setting. It is important that the voltage going to the heater does not exceed 6.3 V, as this could damage it.
2. The current can be finely adjusted by the knob on the device. eB/m = velocity/r = w, and e/m = 2 *Voltage/(B^2 * r^2), where B is the magnetic flux density, ~7.8*10^-4 T, according to the device.
3. To go back and forth between the relationships, note that eV = ½ m v^2. B at the midpoint between the coils can be determined by noting that B ~ 9.02 * 10^-7 N * I / R, where R is the average of the radius of the coils.
e/m setup in M1B
2 HP power supplies in D2B
Multimeter in various desks/workrooms
Regulated power supply in D2B
6-8 banana plug cables in backwall
Power cables in back wall
N/A
N/A
N/A