Published by:
CGP EDU Academic Team
Published on: September 11, 2026
The material of permanent magnet has
Text Solution
Verified by ExpertsThe correct answer is:
D
Step 1: Understand the properties of permanent magnets. Permanent magnets are materials that maintain their magnetization after the external magnetic field is removed.
Step 2: Definitions:
- Retentivity refers to the ability of a material to retain its magnetization.
- Coercivity is the ability of a material to withstand an external magnetic field without becoming demagnetized.
Step 3: Permanent magnets need to have high retentivity so that they can keep their magnetism for long periods. They also require high coercivity to resist demagnetization when exposed to external magnetic fields.
Step 4: Given the above definitions and properties, the correct characteristics of permanent magnets imply that they have high retentivity and high coercivity.
Therefore, the answer is D.
Step 2: Definitions:
- Retentivity refers to the ability of a material to retain its magnetization.
- Coercivity is the ability of a material to withstand an external magnetic field without becoming demagnetized.
Step 3: Permanent magnets need to have high retentivity so that they can keep their magnetism for long periods. They also require high coercivity to resist demagnetization when exposed to external magnetic fields.
Step 4: Given the above definitions and properties, the correct characteristics of permanent magnets imply that they have high retentivity and high coercivity.
Therefore, the answer is D.
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