True or false? A piece of steel is permanently magnetised when placed near a magnet.
Answers
Answer:
Steel is an alloy of iron and so can also be made into a magnet. If these metals have not been turned into a permanent magnet they will still be attracted to a magnet if placed within a magnetic field. In this situation they act as a magnet - but only whilst in the magnetic field. This is called induced magnetism.
Explanation:
ANSWER
Steel bar placed in a solenoid becomes an permanent magnet. A solenoid is a coil of wire designed to create a strong magnetic field inside the coil. By wrapping the same wire many times around a cylinder, say steel cylinder, the magnetic field due to the wires can become quite strong. The number of turns refers to the number of loops the solenoid has. More loops will bring about a stronger magnetic field.
Answer:
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