Download App

Magnetic Properties of Matter — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsMagnetic Properties of Matter3 Marks
Question
Why is it not possible to make permanent magnets from paramagnetic materials?
✓

Answer

Permanent magnets are made from the material that are easily magnetized and retain the magnetization even reverse magnetizing field is applied (high coercivity). Paramagnetic materials get small magnetization, if they are placed in magnetic field, they lose their magnetization easily if the reverse field is applied. Hence, they are not used to make permanent magnet.

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 "3 Marks Question" from Magnetic Properties of Matter→Magnetic Properties of Matter — all question types→Physics STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

The parallax of a heavenly body measured from two points diametrically opposite on earth's equator is 60 second. If the radius of earth is 6.4 × 106m, determine the distance of the heavenly body from the centre of earth. Convert this distance in A.U. Given 1 A.U. = 1.5 × 1011m.
→
A train standing at the outer signal of a railway station blows a whistle of frequency 400Hz still air. The train begins to move with a speed of 10m s-1 towards the platform. What is the frequency of the sound for an observer standing on the platform? (sound velocity in air = 330m s–1)
→
A transverse wave of amplitude 0.50mm and frequency 100Hz is produced on a wire stretched to a tension of 100N. If the wave speed is 100m/s, what average power is the source transmitting to the wire?
→
Prove that the coefficient of static friction is “tangent” of the angle of repose.
→
Show that a.(b × c) is equal in magnitude to the volume of the parallelepiped formed on the three vectors a, b and c.
→
A ball is thrown from a roof top at an angle of 45° above the horizontal. It hits the ground a few seconds later. At what point during its motion, does the ball have. Explain?
  1. greatest speed.
  2. smallest speed.
  3. greatest acceleration?
→
A woman throws an object of mass 500g with a speed of 25m s1.

If the object hits a wall and rebounds with half the original speed, what is the change in momentum of the object?

→
Show that when a particle is moving in S.H.M. its velocity at a distance $\frac{\sqrt{3}}{2}$ of its amplitude from the central position is half its velocity in central position.
→
The photograph of a house occupies an area of 1.75cm2 on a 35mm slide. The slide is projected on to a screen, and the area of the house on the screen is 1.55m2. What is the linear magnification of the projector-screen arrangement.
→
The current in a long solenoid of radius R and having n turns per unit length is given by $\text{i}=\text{i}_0\sin\omega\text{t}.$ A coil having N turns is wound around it near the centre. Find
  1. The induced emf in the coil.
  2. The mutual inductance between the solenoid and the coil.
→