Why is electromagnet widely used in electric appliances give any two reasons​

The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. ... Electromagnets are also employed in industry for picking up and moving heavy iron objects such as scrap iron and steel

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this is not an education question

answer; ///first blank (50) fellowships points; second blank; // (5 year);