Magnetic Properties of Matter

There are four lightweight rod samples P, Q, R and S separately suspended by thread. A bar magnet is slowly brought near to each sample and the following observations are noted (a) P is weakly repelled (b) R is strongly…

A magnetizing field of $360\ \text{A/m}$ produces a magnetic flux density $B = 0.6\ \text{T}$ in a ferromagnetic material. The permeability of the material in T-m/A is

In an experiment, the interior of a first current-carrying toroid with $1000$ turns per unit length is filled with aluminum (susceptibility $2.4 \times 10^{-5}$). A second, identical toroid with $500$ turns per unit…

The magnetic induction produced at the centre of the air-core solenoid is $B_0$. If the air-core is replaced by an iron-core of susceptibility $\chi$, the magnetic induction is $B_1$. The ratio of $\dfrac{B_1}{B_0}$ is

A paramagnetic sample shows a net magnetization of $8$ A/m when placed in an external magnetic field of $0.6$ T at a temperature of $4$ K. When the same sample is placed in an external magnetic field of $0.2$ T at a…

Which of the following statements is INCORRECT for diamagnetic materials? a. Relative permeability is less than one. b. Magnetic susceptibility is negative and low. c. Magnetic susceptibility does not depend on the…

A magnetizing field of $10^3\ \text{A/m}$ produces a magnetic flux density $4\pi$ T in an iron rod. The relative permeability of the rod will be (permeability of free space $\mu_0 = 4\pi \times 10^{-7}$ SI units)

Magnetic susceptibility ($\chi$) is related to magnetic relative permeability ($\mu_r$) by the relation

A magnetic material has a relative permeability $(\mu_r)$ of $6001$. If it is placed in a magnetizing field (magnetic intensity) of $H = 2000\ \text{A/m}$, The total magnetic induction $(B)$ inside the material is…

Electromagnets are made of soft iron because soft iron has

The magnetic susceptibility of an ideal diamagnetic substance is

If the given figure shows the relation between magnetic field (B-along $y$-axis) and magnetic intensity (H -along x -axis) of a ferromagnetic material, then the point that represents coercivity of the material is