LP Industry
New member
The two are majorly differentiated on the basis of the generation of the magnetic field. So, the difference between an electromagnet and a permanent magnet is that an electromagnet generates a magnetic field when an electric current is provided to it. As against, a permanent magnet produces a magnetic field on its own when it is magnetized.
Key Differences Between Electromagnet and Permanent Magnet
Therefore, this discussion concludes that the magnetic field of the electromagnet depends on current thus is temporary in nature. While the field of the permanent magnet is permanent once magnetized.
The size of the conductor should not be less than 2.6 mm2 or half of the wire used for electrical wiring. Bare copper wire is used for earthing and grounding. Green 6 THHN (Thermoplastic high heat neutral coating wire) and gauged copper wire of different sizes like 2,4,6,8 etc. are also used for earthing and grounding.
Key Differences Between Electromagnet and Permanent Magnet
- An electromagnet offers temporary magnetization while a permanent magnet exhibits permanent magnetization for a considerable amount of time.
- The magnetic field of the electromagnets depends on the current flowing through the material. However, in the case of permanent magnets, the magnetic field exists in the material once magnetized.
- As electromagnetic materials require a continuous flow of current thus regular supply of electric power is necessary in the case of electromagnets. While this is not the case with permanent magnets.
- Generally, whenever there arises the need for demagnetizing the magnet then electromagnets are demagnetized simply by removing the flow of current through the material. While excess high temperature is required to provide in order to demagnetize, the permanent magnet
- For an electromagnet, the strength of the magnetic field changes according to the amount of current flowing through the material. However, although a permanent magnet holds the magnetic field permanently for a very long duration if the magnetic property gets lost then the material is useless.
- A solenoid winding across an iron core is an example of the electromagnet, whereas, for a permanent magnet, the bar magnet is an example.
- The initial cost of an electromagnet is low but it requires a continuous source of energy to produce a magnetic field. As against permanent magnets are comparatively costlier than electromagnets but does not require an external power supply.
- As electromagnets need copper coupling thus needs larger space while permanent magnets have a comparatively compact structure.
- The polarity of electromagnets depends on the direction of the flow of current thus it can be varied. However, the polarity in the case of permanent magnets is fixed and cannot be changed.
Therefore, this discussion concludes that the magnetic field of the electromagnet depends on current thus is temporary in nature. While the field of the permanent magnet is permanent once magnetized.
The size of the conductor should not be less than 2.6 mm2 or half of the wire used for electrical wiring. Bare copper wire is used for earthing and grounding. Green 6 THHN (Thermoplastic high heat neutral coating wire) and gauged copper wire of different sizes like 2,4,6,8 etc. are also used for earthing and grounding.