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1.a soft metal core made into a magnet by the passage of electric current through a coil surrounding it.
2. A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. ... An electromagnet is made from a coil of wire which acts as a magnet when an electric current passes through it.
3.Electromagnets are widely used as components of other electrical devices, such as motors, generators, electromechanical solenoids, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment.
4.The magnetic effect of electric current is known as electromagnetic effect. It is observed that when a compass is brought near a current carrying conductor the needle of compass gets deflected because of flow of electricity. This shows that electric current produces a magnetic effect.
5.A permanent magnet is one that retains its magnetic properties for a long period of time. ... Temporary magnets are those that simply act like permanent magnets when they are within a strong magnetic field.
Answer:
upper answer is correct...........