Electromagnets

Designed for student experiments in electromagnetism, this U-Shaped Electromagnet encourages students to discover and learn the relationship between electricity and magnetism. Requires standard laboratory power supply, maximum voltage 12 V DC. Weight: 0.3 kg. Dimensions (W x L xD): 100 x 150 x 50 mm.

This apparatus is used to study the effect of number of coils on the strength of an electromagnet. The effect of current on strength of the electromagnet can also be studied. The electromagnet coil has 4 mm sockets and tappings at 100, 200, 300, 400, 500 and 600 turns. A hook on the underside allows paper clips to be attached to indicate the strength of the electromagnet for each variable. A low voltage laboratory power supply is also required.

The Relay Demonstration Unit allows the investigation and study of how a relay functions, in a clear and practical manner. A useful property of this unit is that the circuit powering the coil is easily seen to be completely separate from the circuit switched on by the relay. This is one of the reasons relays are used where safe low voltage circuit can be used to control high voltage circuit. When current flows through the coil an electro-magnetic field is produced. This field attracts the iron armature whose end makes the contact, completing the circuit and illuminating the lamp. When the current is switched off, the contact will open again, switching the circuit off. Specifications: • Control input voltage: 2 V DC • Switched supply voltage: 12 V Max

All the components of an electric bell are mounted on a large panel. All wiring is visible and parts are large in size. Operates on 3-4 volts DC

The globe is suspended from an electromagnet. This makes the friction very low and the earth will rotate at constant speed for many hours after being spun around. AC adapter included. Dimensions (Dia.): 200mm.

This current balance apparatus (BIL coil) consists of a printed circuit board coil mounted on a support handle. The board has 2 coils one with 5 turns and one with 10 turns, rated at 2 A. The apparatus can be used to measure the force on current carrying conductor in magnetic field. permanent magnet should be placed on the pan of digital balance (a yoke with 2 ceramic magnets will work) and the BIL coil mounted in vertical plane between the magnets. When connected to low voltage power supply and ammeter, the balance will be deflected and the new reading can be taken. The force on current carrying conductor and field strength can then be calculated.