If the B-H curves of two samples of P and Q o | vedclass

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(B) For a permanent magnet, we require a material with high retentivity (to ensure a strong magnetic field) and high coercivity (so that the magnetiza

Vedclass · Accepted Answer

$P$ is suitable for making permanent magnets and $Q$ for making electromagnets.

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(B) For a permanent magnet, we require a material with high retentivity (to ensure a strong magnetic field) and high coercivity (so that the magnetization is not easily wiped out by external magnetic fields or temperature fluctuations).For an electromagnet, we require a material with high magnetic permeability, high saturation magnetization, low retentivity, and low coercivity. $A$ small hysteresis loop area is preferred to minimize energy loss during magnetization cycles.In the given $B-H$ curves, sample $P$ has a larger hysteresis loop area and higher coercivity, making it suitable for a permanent magnet.Sample $Q$ has a smaller hysteresis loop area and lower coercivity, making it suitable for an electromagnet.Therefore, $P$ is suitable for making permanent magnets and $Q$ for making electromagnets.

If the $B-H$ curves of two samples of $P$ and $Q$ of iron are as shown below, then which one of the following statements is $CORRECT$?

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