Q371
Magnetic keepers are used to protect magnets from :
A.
Earth's magnetic field
B.
Effect of other magnets
C.
Self-demagnetization
AnswerD.
Demagnetization due to heating
Answer: Option C
Solution
Answer: Option C
Solution:
Magnetic keepers are soft iron bars placed at either end of the pair of magnets. It is used to avoid self-demagnetisation of magnets.