Magnetic Properties of Matter

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…

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

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…

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…

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

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)

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…

Electromagnets are made of soft iron because soft iron has

The magnetic susceptibility of an ideal diamagnetic substance is

A short magnetic needle is pivoted in a uniform magnetic field of induction $1 \mathrm{~T}$. Now, simultaneously another magnetic field of induction $\sqrt{3} \mathrm{~T}$ is applied at right angles to the first field;…