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It is the property of a material by virtue of which it allows itself to be magnetized. Permeability varies from material to material depending upon the saturation and temperature. A good magnetic material must have high permeability.
μ=B/H
Where μ=permeability
B=Flux density
H=Magnetic force
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Short Sightened OR Myopia: When a person can't able to see objects clearly but can see near objects clearly. This defect of vision is known as short sightedness.
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