$A$ thin,lightweight rod of a diamagnetic substance,such as silver,is suspended in a uniform external magnetic field. It will align itself with its length:

Consider the regular array of vertical identical current-carrying wires (with the direction of current flow as indicated in the figure alongside) protruding through a horizontal table. If we scatter some diamagnetic particles on the table,then they are likely to accumulate:

$A$ sample of paramagnetic salt contains $2.0 \times 10^{24}$ atomic dipoles each of dipole moment $1.5 \times 10^{-23} \; J \, T^{-1}$. The sample is placed under a homogeneous magnetic field of $0.64 \; T$ and cooled to a temperature of $4.2 \; K$. The degree of magnetic saturation achieved is $15 \%$. What is the total dipole moment of the sample for a magnetic field of $0.98 \; T$ and a temperature of $2.8 \; K$? (Assume Curie's law)

Which of the following figures best represents the variation of magnetic susceptibility $(\chi)$ with temperature for a diamagnetic substance?

Assertion: Electromagnets are made of soft iron.
Reason: Coercivity of soft iron is small.

When a magnetic substance is heated,then it