write any two properties of material
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Explanation:
The four properties of material are mass, toughness, hardness and malleability. EXPLANATION: Materials occurs in nature according to their compactness. Material are categorized into three common states in which they are present, they are solid liquid and gas.
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Answer:
Permanent Magnets:
1) High Retentivity: Magnet should be strong
2) High coercivity: Magnetisation should not get affected by stray Magnetic fields
Electromagnets:
1) High Permeability core of Iron for easy magnetisation
2) Low Retentivity: For easy magnetisation/demagnetisation.
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