Which of the following materials is best suited for making magnetic keepers ?
A
Steel
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B
Iron
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C
Alnico
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D
wood
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Solution
The correct option is C wood
Magnetic keeper is also known as Armateur, has the role of each iron,steel at poles to complete the orientation of magnetic circuit and enhance the magnetic strength.
Wood is placed in between two parallel magnets to prevent them as the magnets are brittle and can break easily on shock.