Question
If the B-H curves of two samples of X and Y of iron are as shown below, then which one of the following statement is correct?
BITSAT
Physics
Magnetic Properties of Matter
2022
BITSAT 2022
BITSAT Physics Question (2022) — Solution
Options
- A. Both X and Y are suitable for making electromagnets.
- B. Both X and Y are suitable for making permanent magnet.
- C. X is suitable for making permanent magnet and Y for making electromagnet.
- D. X is suitable for making electromagnet and Y is suitable for permanent magnet.
Answer
C. X is suitable for making permanent magnet and Y for making electromagnet.
Step-by-step solution
For permanent magnet we prefer a material with high retentivity and high coercivity. For electromagnet, we prefer high saturated magnetism, low coercivity and least possible area of hystersis loop. Therefore, X is suitable for making permanent magnet and Y for making electromagnet.
Related: Physics — Magnetic Properties of Matter · All PYQ Banks