electromagnet, device consisting of a core of magnetic material surrounded by a coil through which an electric current is passed to magnetize the core. An electromagnet is used wherever controllable magnets are required, as in contrivances in which the magnetic flux is to be varied, reversed, or switched on and off.
What is a electromagnet Class 7?
Answer: An electromagnet is a coil of insulated wire wound around a piece of a magnetic substance such as soft iron. The magnetic substance acts as a magnet as long as the current flows in the wire.
What is a electromagnet for Class 6?
An electromagnet is a magnet that runs on electricity. Unlike a permanent magnet, the strength of an electromagnet can easily be changed by changing the amount of electric current that flows through it. The poles of an electromagnet can even be reversed by reversing the flow of electricity.
What is an electromagnet Class 9?
A magnet is able to attract or repel another magnet or a magnetic material. If you wind coils of wire around a soft iron core and pass an electric current through the wire, magnetism is induced in the core. This core behaves like a magnet as long as the current is running and is called an electromagnet.
What is electromagnet and its uses class 10?
An electromagnet is a kind of magnet where the magnetic field is created by an electric current. The uses of electromagnets are given here to help learners understand the topic more effectively. Electromagnets can be considered as a temporary magnet that functions with the help of an electric current.
What is electromagnet and its uses Class 7?
Answer: An electric bell works with the help of an electromagnet. It is made up of a coil of wire wound on an iron piece, which acts as an electromagnet. On passing the current, magnetic field is produced by the electromagnet. The hammer of the bell is attracted towards the electromagnet when the circuit is complete.
What are the two uses of electromagnet?
- 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.
What are electromagnets GCSE physics?
A solenoid with an iron core is called an electromagnet . A simple electromagnet is made by coiling wire around an iron nail. Electromagnets are used in devices such as electric bells, and door locks that can be controlled remotely.
What is electromagnet short answer?
Definition of electromagnet : a core of magnetic material (such as iron) surrounded by a coil of wire through which an electric current is passed to magnetize the core.18 Jan 2022
What is electromagnet BBC Bitesize?
Electromagnets. When an electric current flows in a wire, it creates a magnetic field around the wire. This effect can be used to make an electromagnet . A simple electromagnet comprises a length of wire turned into a coil and connected to a battery or power supply. adding more turns to the coil.
How do electromagnets work GCSE?
What is an electromagnet? When a current flows in a wire, it creates a circular magnetic field around the wire. This magnetic field can deflect the needle of a magnetic compass.