If a wire carrying current produces magnetic field around it, why its not attracted to nearby metals ? In a general household.
In: 477
In a straight wire, their magnetism is weak. If you curl it up into a coil, this magnifies the magnetic field, and such a device is called an “air core solenoid”.
If you then insert a iron/steel bar into the center of the coil, it becomes an iron-core solenoid. It can also be called an electromagnet, because the magnetism goes from strong to weak and back to strong as the current is turned on or shut off.
Latest Answers