JEE PYQ: Magnetism And Matter Question 5
Question 5 - 2020 (02 Sep 2020 Shift 1)
Magnetic materials used for making permanent magnets (P) and magnets in a transformer (T) have different properties of the following, which property best matches for the type of magnet required?
(1) T : Large retentivity, small coercivity
(2) P : Small retentivity, large coercivity
(3) T : Large retentivity, large coercivity
(4) P : Large retentivity, large coercivity
Show Answer
Answer: (4) P : Large retentivity, large coercivity
Solution
Permanent magnets (P) are made of materials with large retentivity and large coercivity. Transformer cores (T) are made of materials with low retentivity and low coercivity.
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