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CUET Preparation Today
With regard to ferromagnetic materials, which of the following statement is true? |
Hard ferromagnetic materials are used in permanent magnets because they have large hysteresis area Soft ferromagnetic materials are used in permanent magnets because they large hysteresis area Soft materials have smaller area of hysteresis and therefore used in permanent magnets Hard materials have smaller areas of hysteresis and therefore are used in permanent magnets |
Hard ferromagnetic materials are used in permanent magnets because they have large hysteresis area |
The correct answer is Option (1) → Hard ferromagnetic materials are used in permanent magnets because they have large hysteresis area The ferromagnetic material which retain magnetisation for a long period of time are called hard magnetic material or hard ferromagnets. They are used for permanent magnets as they have large hysteresis area which gives high retentivity and high coercivity which is ideal for permanent magnet material. |
