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प्रश्न
Give any ‘two’ points of differences between diamagnetic and ferromagnetic substances.
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उत्तर
| Diamagnetic Substance | Ferromagnetic Substance | ||
| 1 | Weakly repelled by a magnet | 1 | Strongly attracted by a magnet |
| 2 | When kept in a non-uniform magnetic field, it shows moderate tendency to move from stronger to the weaker part of the field. | 2 | When kept in a non-uniform magnetic field, it shows strong tendency to move from weaker to the stronger part of the field. |
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संबंधित प्रश्न
Which of the following substances is ductile?
In what way is the behaviour of a diamagnetic material different from that of a paramagnetic, when kept in an external magnetic field?
Which of the following substances are diamagnetic?
Bi, Al, Na, Cu, Ca and Ni
Which of the following substances are para-magnetic?
Bi, Al, Cu, Ca, Pb, Ni
The susceptibility of a magnetic material is − 2.6 × 10−5. Identify the type of magnetic material and state its two properties.
A tangent galvanometer shows a deflection of 45° when 10 mA of current is passed through it. If the horizontal component of the earth's magnetic field is `B_H = 3.6 xx 10^-5 "T"` and radius of the coil is 10 cm, find the number of turns in the coil.
Identify the following magnetic materials :
Choose the correct option:
A rectangular magnet suspended freely has a period of oscillation equal to T. Now it is broken into two equal halves (each having half of the original length) and one piece is made to oscillate freely. Its period of oscillation is T′, the ratio of T′/T is ______.
What happens to a ferromagnetic material when its temperature increases above curie temperature?
Answer in brief.
Discuss the Curie law for paramagnetic material.
The susceptibility of a magnetic material is positive and small. The material is ______.
The magnetic susceptibility of a paramagnetic material at - 73 °C is 0.0075. Its value at -173 °C will be ______.
All atoms of a magnetic substance have a resultant magnetic moment even in absence of external magnetic field. The substance is ______.
If a magnetic field is applied to a liquid in one arm of a narrow U-tube, the liquid level in that arm is lowered. The liquid in U-tube arm is ______.
Relative permittivity and permeability of a material are `epsilon_"r"` and `µ_"r"` respectively. Which of the following values of these quantities are allowed for a diamagnetic material?
The materials having negative magnetic susceptibility are ____________.
The earth’s field departs from its dipole shape substantially at large distances (greater than about 30,000 km). What agencies may be responsible for this distortion?
A short bar magnet has a magnetic moment of 0.48 J T−1. Give the direction and magnitude of the magnetic field produced by the magnet at a distance of 10 cm from the centre of the magnet on
- the axis,
- the equatorial lines (normal bisector) of the magnet.
Why is diamagnetism, in contrast, almost independent of temperature?
Is the permeability of a ferromagnetic material independent of the magnetic field? If not, is it more for lower or higher fields?
A Rowland ring of mean radius 15 cm has 3500 turns of wire wound on a ferromagnetic core of relative permeability 800. What is the magnetic field B in the core for a magnetising current of 1.2 A?
Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond curie temperature, then it will show ______.
Which of the following property shows the property of ferromagnetic substances?
When a ferromagnetic material is created above its curie temperature
Earth's magnetic field analyses has a horizontal component except at:-
A hydrogen atom is paramagnetic. A hydrogen molecule is
For a diamagnetic material
If the magnetizing field on a ferromagnetic material is increased, its permeability ______.
Magnetic susceptibility for a paramagnetic and diamagnetic materials is respectively ______.
An ammeter of resistance R gives a full-scale deflection when a current of 2 A passes through it. If it is measured with a maximum current of 10 A, the required shunt is ______.
Which of the following has a permeability less than that of free space?
Which of the following cannot modify an external magnetic field as shown in the figure?
Explain ferromagnetism on the basis of the domain theory.
Explain the origin of paramagnetism on the basis of atomic structure.
Explain the Domain theory in brief.
Magnetic susceptibility of a diamagnetic substance ______.
Match List-I with List-II.
| List-I (Material) | List-II (Susceptibility) | ||
| A. | Diamagnetic | I. | χ = 0 |
| B. | Ferromagnetic | II. | 0 > χ ≥ −1 |
| C. | Paramagnetic | III. | χ >> 1 |
| D. | Non-magnetic | IV. | 0 < χ < ε |
Choose the correct answer from the options given below:
On what basis are materials broadly classified into diamagnetic, paramagnetic, and ferromagnetic groups?
How do diamagnetic substances respond to a magnetic field?
How do paramagnetic substances respond to a magnetic field?
Which list contains only examples of paramagnetic substances?
Which list contains only examples of ferromagnetic substances?
How does the magnetic susceptibility of a paramagnetic material vary with its absolute temperature under Curie's Law?
Which mathematical relation expresses Weiss Law for ferromagnetic substances above the Curie temperature?
What happens to ferromagnetic substances on heating beyond the Curie temperature?
How are the tiny domains oriented in an unmagnetised ferromagnetic specimen?
