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Material subjected to rapid reversal of magnetism should have:
- a)Large area of B – H loop
- b)High permeability and low hysteresis loss
- c)High coercivity and high retentivity
- d)High coercivity and low density
Correct answer is option 'B'. Can you explain this answer?
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Material subjected to rapid reversal of magnetism should have:a)Large ...
Permeability is the measure of the ability of a material to support the formation of a magnetic field within itself. It is the degree of magnetization that a material obtains in response to an applied magnetic field. Hence permeability should be high to rapid reversal of magnetism.
Hysteresis loss is caused by the magnetization and demagnetization of the core as current flows in the forward and reverse directions. Hence it should be low.
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Material subjected to rapid reversal of magnetism should have:a)Large ...
Magnetic material subjected to rapid reversal of magnetism should have:
a) Large area of magnetic domains: Magnetic domains are regions within a material where the magnetic moments of the atoms or molecules are aligned in the same direction. When magnetism is rapidly reversed, the material needs to have large magnetic domains in order to minimize the energy required for the reversal process. This allows for efficient and rapid magnetization reversal.
b) High coercivity: Coercivity is the ability of a material to resist changes in its magnetization. A material with high coercivity is more difficult to magnetize or demagnetize, which means it can withstand rapid changes in magnetism without easily losing its magnetic properties.
c) Low hysteresis: Hysteresis is the lagging of an effect behind its cause, in this case, the lagging of magnetization behind the applied magnetic field. A material with low hysteresis has a small energy loss during the magnetization reversal process, making it more efficient and suitable for rapid changes in magnetism.
d) Good thermal stability: Rapid reversal of magnetism can generate heat, so a material with good thermal stability can withstand the temperature rise without losing its magnetic properties or undergoing structural changes.
e) High magnetic saturation: Magnetic saturation refers to the maximum amount of magnetic flux that a material can hold. A material with high magnetic saturation can quickly reach its maximum magnetization, making it more suitable for rapid changes in magnetism.
Overall, materials with large magnetic domains, high coercivity, low hysteresis, good thermal stability, and high magnetic saturation are ideal for rapid reversal of magnetism.
a) Large area of magnetic domains: Magnetic domains are regions within a material where the magnetic moments of the atoms or molecules are aligned in the same direction. When magnetism is rapidly reversed, the material needs to have large magnetic domains in order to minimize the energy required for the reversal process. This allows for efficient and rapid magnetization reversal.
b) High coercivity: Coercivity is the ability of a material to resist changes in its magnetization. A material with high coercivity is more difficult to magnetize or demagnetize, which means it can withstand rapid changes in magnetism without easily losing its magnetic properties.
c) Low hysteresis: Hysteresis is the lagging of an effect behind its cause, in this case, the lagging of magnetization behind the applied magnetic field. A material with low hysteresis has a small energy loss during the magnetization reversal process, making it more efficient and suitable for rapid changes in magnetism.
d) Good thermal stability: Rapid reversal of magnetism can generate heat, so a material with good thermal stability can withstand the temperature rise without losing its magnetic properties or undergoing structural changes.
e) High magnetic saturation: Magnetic saturation refers to the maximum amount of magnetic flux that a material can hold. A material with high magnetic saturation can quickly reach its maximum magnetization, making it more suitable for rapid changes in magnetism.
Overall, materials with large magnetic domains, high coercivity, low hysteresis, good thermal stability, and high magnetic saturation are ideal for rapid reversal of magnetism.
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Material subjected to rapid reversal of magnetism should have:a)Large area of B – H loopb)High permeability and low hysteresis lossc)High coercivity and high retentivityd)High coercivity and low densityCorrect answer is option 'B'. Can you explain this answer?
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