how will you proof with the help of magnet the substance is magnetic
Answers
Answer:
when substance attached with magnet.
Magnets are substances that have a magnetic field and can attract other magnetic substances without actual direct contact. Magnets are made from magnetic substances and can be temporary (such as electromagnets) or permanent. Electromagnets are made by passing electricity though a coil of conductive wire (like copper wire) wrapped around a metallic core (such as an iron core). When the current flow is stopped, the electromagnet loses its magnetic properties.
In comparison, an extensive manufacturing process is required to prepare a permanent magnet. Powdered magnetic material (whether made directly by crushing magnetic material or by first melting the material or a mixture and then powdering the cooled mass) is used for this purpose. Powdered magnetic material is compressed to form a given shape, while aligning the magnetic elements through the use of an external magnetic field. This pressed material is then melted and cooled in the process of sintering, followed by another heating and cooling step, known as annealing. These pieces are then machined to a particular finish and are magnetized by using strong electromagnets.
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