As the electric circuit breaks, the electromagnet remains magnetised. Is it true ??
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It's true*
-An electromagnet is made of a core metal and coil winding around it.
-When it is switched ON, the core is magnetized due to the current in the coil.
-When the electromagnet is switched OFF, even though the current in the coil is zero, the magnetized core will retain some magnetization. This property of a substance to remain magnetized even after removing the magnetizing field is called magnetic retentivity.
*NOTE: However, an electromagnet is made of core material which has very low retentivity in order for it to behave as a magnet only when it is switched ON
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Answer:
the given statment is true
Explanation:
as the electromagnet is made of core metal
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