Physics · Class 10

Electromagnets: Magnetism from Electricity

An electromagnet is a magnet created by electricity instead of natural materials. Electromagnets are stronger than permanent magnets and can be switch

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❓ Quick answer

Can an electromagnet pull or push objects like a permanent magnet?

Yes, electromagnets follow the same magnetic laws as permanent magnets. They attract ferromagnetic materials like iron and steel. Unlike permanent magnets, you can turn electromagnets off and on, and reverse their poles by reversing the current direction.

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Why is soft iron used as a core instead of hard iron or steel?

Soft iron magnetizes easily when current flows and demagnetizes quickly when current stops. Hard iron and steel retain magnetization after current stops, making them unsuitable for electromagnets that need to turn on and off. The ease of magnetization and demagnetization makes soft iron ideal.

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How do industrial electromagnets lift such heavy objects?

Industrial electromagnets use very high currents and many coils around large soft iron cores. This creates extremely strong magnetic fields. The magnetic attraction force between the electromagnet and ferromagnetic objects like steel can exceed many tons. The lifting capacity can be controlled by adjusting the current.

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