Question

In the given question, a statement of Assertion $\left(A\right)$ is given, followed by a corresponding statement of Reason $\left(R\right)$ just below of it. Mark the correct answer.

Assertion$\left(A\right)$ : AlNiCo is used for making permanent magnets.

Reason$\left(R\right)$ : It has a high retentivity and high coercivity.

• A. Both $\left(A\right)$ and $\left(R\right)$ are true and $\left(R\right)$ is the correct explanation of $\left(A\right)$
• B. Both $\left(A\right)$ and $\left(R\right)$ are true and $\left(R\right)$ is not the correct explanation of $\left(A\right)$
• C. $\left(A\right)$ is true and $\left(R\right)$ is false
• D. $\left(A\right)$ is false and $\left(R\right)$ is true

Answer 1

The correct option is A Both $\left(A\right)$ and $\left(R\right)$ are true and $\left(R\right)$ is the correct explanation of $\left(A\right)$

As we know, permanent magnet has higher retentivity and high coercivity.

AlNiCo has high retentivity and high coercivity. Hence, it is prefered for making permanent magnets.

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Hence, $\left(A\right)$ is the correct answer.