Question

How is an electromagnet made? Name two factors on which the strength of the magnetic field of an electromagnet depends.

Answer 1

Hint: An electromagnet is a type of magnet in which an electric current generates a magnetic field. Normally, electromagnets consist of a wire wound into a coil. A current through the wire induces a magnetic field that, denoting the coil core, is concentrated in the hole.

Complete answer:
An electromagnet is created in the form of a solenoid or U-shape by winding an insulated copper wire around a soft iron core. The strength of the electromagnet's magnetic field depends on the following: the number of turns of the wire wrapped around the coil, and. The sum of flowing current through the cable. When the current is turned off, the magnetic field disappears. A magnetic core made from a ferromagnetic or ferrimagnetic material such as iron is also wrapped around the wire turns; the magnetic core concentrates the magnetic flux and allows a stronger magnet.
The iron bar becomes briefly magnetized if a soft iron bar is put within the solenoid and the current is turned on. The theory of the electromagnet is this.
An electromagnet 's power depends on:
1.The greater the current, the greater the frequency of the current that passes through the coil. There is a larger influx of electrons when the current increases, which in turn increases the magnetic field around it.
2.The greater the number of turns in the coils, the greater the power, the greater the number of coils. This is because in the magnetic field, more uniformity is achieved in the number of coils, and thus it is stronger.
3. If it is a soft or hard magnetic substance that makes up the core. The heart of soft iron magnetizes faster than strong magnetic materials like steel.

Note:
The key advantage of an electromagnet over a permanent magnet is that, by regulating the amount of electric current in the winding, the magnetic field can be modified easily. However, unlike a permanent magnet that needs no electricity, in order to sustain the magnetic field, an electromagnet requires a continuous supply of current.