Download App

Magnetic Materials — Physics STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 SciencePhysicsMagnetic Materials3 Marks
Question
What is soft magnetic material?
Soft ferromagntic materials can be easily magnetized and demagnetized.

Image
Hysteresis loop for hard and soft ferramagnetic materials.

✓

Answer

A soft magnetic material, usually iron-based, has high permeability, low retentivity and low coercivity. In other words, it does not have appreciable hysteresis, i.e., its hysteresis loop is very narrow. Such a material magnetizes and demagnetizes more easily, by small external fields.

Image

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Answer the following in Brief" from Magnetic Materials→Magnetic Materials — all question types→Physics STD 12 Science question papers→Maharashtra Board STD 12 Science question papers→Maharashtra Board question paper generator→

Similar questions

Calculate the time taken by a body performing SHM of period 2 seconds to cover half the amplitude starting from an extreme position.
→
With the help of neat diagrams, explain how the non-polar dielectric material is polarised in external filed of increasing intensity. Define polarisation in dielectrics.
→
State the laws of vibrating strings
→
What should be retentivity and coercivity of permanent magnet?
→
A small body of mass $0.3 \mathrm{~kg}$ oscillates in a vertical plane with the help of a string $0.5 \mathrm{~m}$ long with a constant speed of $2 \mathrm{~m} / \mathrm{s}$. It makes an angle of $60^{\circ}$ with the vertical. Calculate the tension in the string.
→
A railway track goes around a curve having a radius of curvature of 1 km. The distance between the rails is 1 m. Find the elevation of the outer rail above the inner rail so that there is no side pressure against the rails when a train goes around the curve at 36 km/hr.
→
Explain, on the basis of kinetic theory, how the pressure of gas changes if its volume is reduced at constant temperature.
→
Find the kinetic energy of $10 \mathrm{~kg}$ of a monatomic gas at $500 \mathrm{~K}$ if the molar mass of the gas is 4 $\times 10^{-3} \mathrm{~kg} / \mathrm{mol}$.
→
A thin uniform rod $1 \mathrm{~m}$ long has mass $1 \mathrm{~kg}$. Find its moment of inertia and radius of gyration for rotation about a transverse axis through a point midway between its centre and one end.
→
A certain string $500 \mathrm{~cm}$ long breaks under a tension of $45 \mathrm{~kg}$ wt. An object of mass $100 \mathrm{~g}$ is attached to this string and whirled in a horizontal circle. Find the maximum number of revolutions that the object can make per second without breaking the string, $\left[\mathrm{g}=9.8 \mathrm{~m} / \mathrm{s}^2\right.$ ]
→