A. reduced self-demagnetization
B. cancel the effect of the earth’s magnetic field
C. protect the magnet from stray electric field
D. increase the strength of the magnets

Correct Answer: Option A

A. reduced self-demagnetization

SEE ALSO  An object of mass 0.40 kg attached to the end of a string is whirled around in a horizontal circle of radius 2.0m with a constant speed of 8ms−¹. Calculate the angular velocity of the object

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