Question

What is electromagnet?????????

Answer 1

Answer:

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★An electromagnet can be defined as a magnet which functions on electricity. Unlike a permanent magnet, the strength of an electromagnet can be changed by changing the amount of electric current that flows through it. If the current flow is cut, the property of magnetism ceases to exist.

★Working Principle of Electromagnets

• So how do electromagnets work? Let’s consider the iron nail itself. Why does it not produce a magnetic field when not influenced by an electric field?

• Normally, the atoms in the nail are oriented in random directions and individual magnetic fields cancel each other out. Under the influence of electric current, these atoms are reoriented to start pointing in the same direction. All these individual magnetic fields together create a strong magnetic field. As the current flow increases, this degree of reorientation also increases, resulting in a stronger magnetic field. Once all the particles are reoriented perfectly in the same direction, increasing current flow will not affect the magnetic field produced. At this point, the magnet is said to be saturated.

★Uses of Electromagnets

Some electromagnet uses are given in the points mentioned below:

• Particle Accelerators
• Amplifiers
• Magnetic Separation
• Electric Motors and Generators
• MRI machines
• Control Switches in Relays
• Transportation
• Spacecraft Propulsion Systems
• Induction Heating
• Hard Drives

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Answer 2

Answer:

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. Electromagnets usually consist of wire wound into a coil. A current through the wire creates a magnetic field which is concentrated in the hole, denoting the center of the coil.

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