Properties of electromagnets – Rankers Physics

Magnetic Properties of Matter: Practice Problem & Solution

A material suitable for making electromagnets should have
High retentivity and low coercivity
High retentivity and high coercivity
Low retentivity and low coercivity
Low retentivity and high coercivity

Short Solution (Best for NEET):

To solve this problem, we apply the core principles of Magnetic Properties of Matter. Understanding the underlying formula is key to arriving at the correct answer below:

An electromagnet should become strongly magnetized when current is on, and lose its magnetization quickly when current is off. Therefore, it requires high retentivity and low coercivity.

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