CBSE · Class 12 · Physics · Magnetism and MatterPermanent magnets are usually made of materials that have:
Step-by-Step Solution
Permanent magnets require materials with high retentivity (so they retain a strong magnetic field) and high coercivity (so they are not easily demagnetized by stray magnetic fields). Steel and Alnico are common examples.
Detailed Options Breakdown
Option : Low retentivity and low coercivity
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Magnetism and Matter.
Option 1: High retentivity and low coercivity
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Magnetism and Matter.
Option 2: High retentivity and high coercivity (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 3: Low retentivity and high coercivity
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Magnetism and Matter.
💡 Study Guide: This question tests core syllabus concepts from Magnetism and Matter. For formulas, key summaries, and mock exam reference guides, read the full Magnetism and Matter Revision Notes.