Question
Can we have magnetic hysteresis in paramagnetic or diamagnetic substances?
✓
Answer
No, magnetic hysteresis is the lagging of intensity of magnetization (I) behind magnetising force (H). When diamagnetic and paramagnetic materials are placed in a magnetic field they get weekly magnetised. Also, they lose their magnetization as the magnetic field is removed (low retentively). Therefore, they do not form magnetic hysteresis curve.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A horizontal straight wire 10m long extending from east to west is falling with a speed of 5.0ms–1, at right angles to the horizontal component of the earth’s magnetic field, 0.30 × 10–4Wbm–2.
- What is the instantaneous value of the emf induced in the wire?
- What is the direction of the emf?
- Which end of the wire is at the higher electrical potential?
Define the terms threshold frequency and stopping potential in relation to the phenomenon of photoelectric effect. How is the photoelectric current affected on increasing the (1) frequency (2) intensity of the incident radiations and why?
The horizontal component of the earth's magnetic field at a certain place is $3.0 \times 10^{-5} T$ and the direction of the field is from the geographic south to the geographic north. A very long straight conductor is carrying a steady current of $1 A$. What is the force per unit length on it when it is placed on a horizontal table and the direction of the current is (a) east to west; (b) south to north?
→How will establish displacement current of 6 A between the plates of a capacitor of capacitance $6 \mu F$ ?
→A tank is filled with water to a height of 12.5 cm. The apparent depth of a needle lying at the bottom of the tank is measured by a microscope to be 9.4 cm. What is the refractive index of water? If water is replaced by a liquid of refractive index 1.63 up to the same height, by what distance would be the microscope have to be moved to focus on the needle again?
Two blocks of masses 10kg and 30kg are placed along a vertical line. The first block is raised through a height of 7cm. By what distance should the second mass be moved to raise the centre of mass by 1cm?
Figure shows a smooth track, a part of which is a circle of radius R. A block of mass m is pushed against a spring of spring constant k fixed at the left end and is then released. Find the initial compression of the spring so that the block presses the track with a force mg when it reaches the point P, where the radius of the track is horizontal.
Figure shows a light bulb (B) and iron cored inductor connected to a dc battery through a switch (S).
- What will one observe when switch (S) is closed?
- How will the glow of the bulb change when the battery is replaced by an ac source of rms voltage equal to the voltage of dc battery? Justify your answer in each case.
A current-carrying circular coil of 100 turns and radius 5.0cm produces a magnetic field of 6.0 × 10-5T at its centre. Find the value of the current.
Which among the curves shown in figure cannot possibly represent electrostatic field lines?
