# What are the two uses for electromagnets?

Electromagnets are used in two ways: Electromagnets are employed in the manufacture of a wide range of devices, including electric bells, loudspeakers, electric motors, electric fans, and so on. Doctors utilize electromagnets to remove small iron fragments from a patient's eyes (which may have fallen into the eyes by accident).

The first electromagnet was invented in 1820 by Michael Faraday. He called it an "electro-magnet" because it used electricity instead of steam to operate its mechanism. Today, all electromagnets work on similar principles to those described by Faraday - they use changes in magnetic fields to produce forces on objects with magnetism such as metal particles or wood fibers.

An electromagnet consists of a coil of wire through which an electrical current can be passed. The magnetic field produced by the current in the coil creates a force on any metal particles that are near its surface. This force attracts or repels the particles; depending on whether the current is flowing into or out of the core of the magnet.

In the case of industrial magnets, the coil usually takes the form of several layers of thin metal tape which are wound around a central pole piece. These layers are called turns of the coil. When current flows through the coil, a magnetic field is generated which causes the iron core inside the coil to become magnetized, thereby producing a large amount of force on any metal particles that come close to it.

## Which devices use electromagnets brainily?

Electromagnets are found in electromechanical equipment such as motors, generators, electric bells, loudspeakers, headphones, and so on. Data storage: Electromagnets are utilized in electronic devices such as computers and cellphones to store data. Electromagnetism underpins the operation of MRI equipment. Magnetic fields act like tiny magnets on any metal objects that they touch, causing them to align with the field's direction.

Which statement about electricity is false? Electricity always flows from a higher potential energy state to a lower one. This is true for all forms of electrical current except nuclear current which flows in the opposite direction. Electricity cannot be created or destroyed, it can only be transformed from one form to another. Electrical power is the ability of a circuit to do work; it is not related to the flow of current through the circuit. The more powerful an electrical circuit is, the more work it can do. Power is calculated by multiplying voltage times current. For example, if you connect a 9V battery to a light bulb, the battery will be drained in a few hours even though the current is very small. If you connect the same battery to a motor, it will run for days because the motor needs much more current to operate at full speed.

Electricity is the flow of electrons through a conductor such as a copper wire. Electric circuits inside equipment use these flows to operate components such as motors, heaters, and lights.

## Which appliances have electromagnets?

Electromagnets are commonly utilized in electric and electromechanical devices such as:

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

## Can electromagnets work when the current is on or off?

Electromagnets are handy because they can be turned on and off by completing or breaking the circuit. An electromagnet works in the same way, except that it is "temporary"â€”the magnetic field exists only when electric current flows. As soon as the current is stopped, so too does the magnetic field collapse.

When current is flowing through a wire, it has a tendency to stay that way. This is why electricity must be fed into wires from another source whenever you want it to go somewhere else. If the current isn't kept pumping into the wire, it will eventually flow out again, which wouldn't do anything for us electrical engineers!

But what if we wanted current to flow into the wire for some reason? We could use an electromagnet to accomplish this task. When an electromagnet is placed near the wire, it attracts the electrons within the wire, causing them to flow along with the current. This is how an electromagnet works: it uses electron magnetism to attract or repel particles.

But this only applies to conductors. If the conductor in question is not supposed to conduct electricity (such as a plastic insulation cover), then an electromagnet won't be able to change this fact. For example, if there was a piece of metal inside the insulation cover, it would be impossible for an electromagnet to draw it out.

## Where are electromagnets used today?

The most prevalent application of electromagnets in the home is in electric motors. Consider all of the electrical appliances that use an electric motor: vacuum cleaners, refrigerators, washing machines, tumble dryers, food blenders, fan ovens, microwaves, dish-washers, and hair dryers. Then there are the various implements for use with a hand blender or food processor: knives, forks, spoons.

Other applications include printing presses (for paper), conveyor belts (for products), and metal forming tools (for manufacturing). There are two types of electric motors used in industry: alternating current (AC) or direct current (DC). AC motors are usually smaller than DC motors, but they need to be wired in a way that allows them to function properly. DC motors are not wired differently from AC motors; instead, they use batteries or other power sources to provide electricity directly to the motor. This page describes how electric motors work, which types are available, and what factors affect their design.

How Electric Motors Work

An electric motor uses a magnetic field created by wires running inside it to produce motion. The first electric motors were based on designs used for steam engines, so they also used coils of wire as components that create the magnetic field inside the body of the motor. These days, most electric motors use semiconductor devices called switches instead. When a switch is closed, it sends a current through the coil which creates a magnetic field.

## Why are electromagnets used in so many electronic devices?

Magnets are utilized to assist in the creation of electricity, and electricity may assist in the creation of an electromagnetic force. Permanent magnets and electromagnets serve diverse functions in electrical equipment. A permanent magnet will attract a metal piece having the same magnetic property, whereas an electromagnet can produce a similar effect only when electric current is passing through it.

Electromagnets are commonly used in inductors to create a magnetic field within the body of the component. This attracts ferrous material such as iron cores or wire windings which are wrapped around the outside of the component's case. The presence of the magnetic field also means that less current is needed to keep the device activated. This reduces the risk of overheating and improves efficiency.

Inductors are essential components in power circuits of radio receivers, television sets, and microwave ovens to name but a few. They require very little space and are very efficient at storing energy in a magnetic field while allowing current to flow through them.

The term "inductor" comes from the Greek word "induo", which means "to bring into action". Thus, an inductor is a component that brings forth or induces a magnetic field.

Electricity flows through an inductor by means of magnetic fields created by coils inside the component.

##### Lindsay Mowen

Lindsay Mowen teaches students about the periodic table of elements and how it relates to their lives. She also teaches them about the various properties of each element, as well as how they are used in different types of technology. Lindsay loves to teach because it allows him to share knowledge with others, and help them learn more about the world around them.

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