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Which of the following conditions are desired in the core of an electromagnet?
- a)High permeability and High retentivity
- b)Low permeability and High retentivity
- c)High permeability and Low retentivity
- d)Low permeability and Low retentivity
Correct answer is option 'C'. Can you explain this answer?
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Which of the following conditions are desired in the core of an electr...
Conditions desired in the core of an electromagnet
Electromagnets are used in various applications where a strong magnetic field is required. The core of an electromagnet plays a crucial role in determining its performance. The core material should possess certain characteristics to ensure efficient and effective operation. The desired conditions in the core of an electromagnet are:
High permeability
- Permeability is a measure of how easily a material can be magnetized.
- A high permeability core material allows for a stronger magnetic field to be produced for a given amount of current flowing through the coil.
- This is important as it enables the electromagnet to generate a strong magnetic field, which is desirable in many applications.
- Materials such as iron, nickel, and cobalt possess high permeability and are commonly used for electromagnet cores.
Low retentivity
- Retentivity is a measure of how well a material retains its magnetization after the magnetizing field is removed.
- A low retentivity core material allows for rapid magnetization and demagnetization, which is important for electromagnet applications where the magnetic field needs to be turned on and off quickly.
- If the core material has high retentivity, the magnetic field may persist even after the current is switched off, leading to undesired effects.
- Materials such as soft iron are commonly used for electromagnet cores due to their low retentivity.
Conclusion
In conclusion, the desired conditions in the core of an electromagnet are high permeability and low retentivity. These properties allow for a strong magnetic field to be generated when current flows through the coil, while also allowing for quick magnetization and demagnetization. Materials such as iron and soft iron are commonly used as core materials in electromagnets due to their suitable characteristics.
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Which of the following conditions are desired in the core of an electr...
Ferromagnetic materials have high permeability and low retentivity. Due to these properties, the core of electromagnets is made up of ferromagnetic materials.
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Which of the following conditions are desired in the core of an electromagnet?a)High permeability and High retentivityb)Low permeability and High retentivityc)High permeability and Low retentivityd)Low permeability and Low retentivityCorrect answer is option 'C'. Can you explain this answer?
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