What three things do you need to make an electromagnet?

What three things do you need to make an electromagnet?

Each group needs:

1. nail, 3-inch (7.6 cm) or longer (made of zinc, iron or steel, but not aluminum)
2. 2 feet (. 6 m) insulated copper wire (at least AWG 22 or higher)
3. D-cell battery.
4. several metal paperclips, tacks or pins.
5. wide rubber band.
6. Building an Electromagnet Worksheet.

What are two advantages of an electromagnet?

Two Advantages of an Electromagnet Over a Permanent Magnet

• Control of Magnet Strength. One of the most important features of an electromagnet is the ability to change its magnetic force.
• Greater Magnet Power. The pulling power of a permanent magnet is limited to the type of metal from which it’s made.
• Electromagnet Uses.
• Permanent Magnet Uses.

What is needed for an electromagnet?

Electromagnets can be created by wrapping a wire around an iron nail and running current through the wire. The electric field in the wire coil creates a magnetic field around the nail. In some cases, the nail will remain magnetised even when removed from within the wire coil.

Does the thickness of a wire affect the strength of an electromagnet?

The strength of the magnet will increase with the increase in the thickness of the wire too because it is already known that resistance is inversely proportional to cross-sectional area. Thus as resistance drops, more current will flow through the electromagnet causing a larger magnetic field.

What is the strength of an electromagnet?

The magnetic field strength of an electromagnet is therefore determined by the ampere turns of the coil with the more turns of wire in the coil the greater will be the strength of the magnetic field.

What are the factors affecting the strength of electromagnet?

Factors that affect the strength of electromagnets are the nature of the core material, strength of the current passing through the core, the number of turns of wire on the core and the shape and size of the core.

What are the uses of electromagnets?

Electromagnets are very widely used in electric and electromechanical devices, including:

• Motors and generators.
• Transformers.
• Relays.
• Electric bells and buzzers.
• Loudspeakers and headphones.
• Actuators such as valves.
• Magnetic recording and data storage equipment: tape recorders, VCRs, hard disks.
• MRI machines.