Magnetic Field Around Various Currents

This demonstration visually shows the magnetic field around different currents. Compasses are placed around a pair of coils and a toroid. When a current through the coils is turned on, the compasses reorient to show the magnetic field.

Setup:

Place the equipment on the lab table. Connect the desired platform with coil to the high current power supply using the high current cables. Arrange the compasses around the coil on the platform. Connect the webcam to the projector system and place it so it views the compasses around the wire.

Turn the knob on the power supply to the desired current. Press the power button on the power supply and hold it for a few seconds. Watch the compasses realign around the coil. Repeat this procedure for the other coil.

Notes:

The power supply is operated by a push button that must be held in to remain on. Do not leave the current on for too long or the wires will get hot.

Courses Used In:

• PHY 10320

• PHY 20435

• PHY 30220

Discussion and Polling Questions:

Coming Soon

Equipment Needed:

• High Current Power Supply

• 4 High Current Banana Cables

• Clear Platform with Pair of Coils Apparatus

• Clear Platform with Toroid Apparatus

• Many Compasses