Physics

Pair of coils for generating a uniform magnetic field perpendicular to the axis of a tube.

Specifications:

• Coil diameter: 300 mm approx.
• Coil spacing: 150 mm.
• Number of turns per coil: 124.
• Enamelled copper wire thickness: 1.2 mm.
• DC resistance: 2 Ohms each.
• Maximum coil current: 5.5 A.
• Maximum coil voltage: 6 V.
• Maximum flux density at 5 A: 2 mT.

Classic demonstration of how a current loop generates a magnetic field. Two coils of insulated wire, with 5 and 10 turns respectively, are wound around a plastic ring. The ring is mounted on a plastic base with 3 binding posts that allow connection to five, ten, or fifteen turns of wire. A magnetic compass (included) can be placed on the base to observe and measure deflection of the compass. With compass 38mm Includes instructions.

To demonstrate conversion of mechanical energy into electrical energy. A copper disc with a turning handle rotates between two poles of a horseshoe magnet. On base with two terminals, one of which is connected to a pillar supporting the disc and the other to a brush bearing on edge of the disc.

Racing Rings consists of three rods one each of copper, aluminum and PVC. When ring magnet is dropped down the PVC rod, it falls unobstructed. When the rings are sent down either of the metal rods, they experience a slower fall. The two metal rods create an induced magnetic field to that adds resistance to the rings’ travel. Since the metals are different, they fall at different rates.