154356
Curie law $\chi T=$ constant, relating magnetic susceptibility $(\chi)$ and absolute temperature $(T)$ of magnetic substances, is obeyed by
1 all magnetic substances
2 paramagnetic substances
3 diamagnetic substances
4 None of the above
Explanation:
B According to Curie's law- $\chi \mathrm{T}=\text { constant }$ It is obeyed by paramagnetic substances. Where, $\chi=$ magnetic susceptibility $\mathrm{T}=\text { absolute temperature }$ Curie's law- It states that the material magnetization is directly proportional to applied magnetic field in case of Paramagnetic material. If the object is heated, the magnetization is viewed to be inversely proportional to the temperature.
CG PET- 2009
Magnetism and Matter
154358
A curve between magnetic moment and temperature of magnet is
1
2
3
4
Explanation:
C Curie temperature is the temperature at which a magnetic substance loses its magnetism (magnetic moment become zero). The magnetic moment in option (c) varies with temperature in such a way that magnetic moment decreases with increase in temperature and at Currie temperature magnetic moment will become zero. Hence, the point of intersection of curve with the ' $T$ ' axis is the curie's temperature.
BITSAT-2006
Magnetism and Matter
154372
The unit of permeability of Vacuum $\left(\mu_{0}\right)$ is
1 $\frac{\mathrm{N}}{\mathrm{A}}$
2 $\frac{\mathrm{N}}{\mathrm{A}^{2}}$
3 NA
4 $\frac{\mathrm{J}}{\mathrm{A}^{2}}$
Explanation:
B Magnetic field, $B=\frac{\mu_{0}}{2 \pi} \times \frac{i}{R}$ or $\mu_{0}=\frac{2 \pi \times B \times R}{i}$ $\therefore$ The unit of $\mu_{0}=\frac{\mathrm{B} \times \mathrm{R}}{\mathrm{i}}$ $=\frac{\mathrm{NA}^{-1} \mathrm{~m}^{-1} \times \mathrm{m}}{\mathrm{A}}$ $=\frac{\text { Newton }}{(\text { Ampere })^{2}}=\frac{\mathrm{N}}{\mathrm{A}^{2}}$
GUJCET 2014
Magnetism and Matter
154374
The magnetic properties of a magnet is lost at its
1 melting point
2 boiling point
3 Curie point
4 triple point
Explanation:
C Curie's law states that in a paramagnetic material the materials magnetization is inversely proportional to the absolute temperature. $\chi=\frac{\mu_{0} \mathrm{C}}{\mathrm{T}}$ All the magnetic material lost their magnetic properties when they are heated above Curie point.
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Magnetism and Matter
154356
Curie law $\chi T=$ constant, relating magnetic susceptibility $(\chi)$ and absolute temperature $(T)$ of magnetic substances, is obeyed by
1 all magnetic substances
2 paramagnetic substances
3 diamagnetic substances
4 None of the above
Explanation:
B According to Curie's law- $\chi \mathrm{T}=\text { constant }$ It is obeyed by paramagnetic substances. Where, $\chi=$ magnetic susceptibility $\mathrm{T}=\text { absolute temperature }$ Curie's law- It states that the material magnetization is directly proportional to applied magnetic field in case of Paramagnetic material. If the object is heated, the magnetization is viewed to be inversely proportional to the temperature.
CG PET- 2009
Magnetism and Matter
154358
A curve between magnetic moment and temperature of magnet is
1
2
3
4
Explanation:
C Curie temperature is the temperature at which a magnetic substance loses its magnetism (magnetic moment become zero). The magnetic moment in option (c) varies with temperature in such a way that magnetic moment decreases with increase in temperature and at Currie temperature magnetic moment will become zero. Hence, the point of intersection of curve with the ' $T$ ' axis is the curie's temperature.
BITSAT-2006
Magnetism and Matter
154372
The unit of permeability of Vacuum $\left(\mu_{0}\right)$ is
1 $\frac{\mathrm{N}}{\mathrm{A}}$
2 $\frac{\mathrm{N}}{\mathrm{A}^{2}}$
3 NA
4 $\frac{\mathrm{J}}{\mathrm{A}^{2}}$
Explanation:
B Magnetic field, $B=\frac{\mu_{0}}{2 \pi} \times \frac{i}{R}$ or $\mu_{0}=\frac{2 \pi \times B \times R}{i}$ $\therefore$ The unit of $\mu_{0}=\frac{\mathrm{B} \times \mathrm{R}}{\mathrm{i}}$ $=\frac{\mathrm{NA}^{-1} \mathrm{~m}^{-1} \times \mathrm{m}}{\mathrm{A}}$ $=\frac{\text { Newton }}{(\text { Ampere })^{2}}=\frac{\mathrm{N}}{\mathrm{A}^{2}}$
GUJCET 2014
Magnetism and Matter
154374
The magnetic properties of a magnet is lost at its
1 melting point
2 boiling point
3 Curie point
4 triple point
Explanation:
C Curie's law states that in a paramagnetic material the materials magnetization is inversely proportional to the absolute temperature. $\chi=\frac{\mu_{0} \mathrm{C}}{\mathrm{T}}$ All the magnetic material lost their magnetic properties when they are heated above Curie point.
154356
Curie law $\chi T=$ constant, relating magnetic susceptibility $(\chi)$ and absolute temperature $(T)$ of magnetic substances, is obeyed by
1 all magnetic substances
2 paramagnetic substances
3 diamagnetic substances
4 None of the above
Explanation:
B According to Curie's law- $\chi \mathrm{T}=\text { constant }$ It is obeyed by paramagnetic substances. Where, $\chi=$ magnetic susceptibility $\mathrm{T}=\text { absolute temperature }$ Curie's law- It states that the material magnetization is directly proportional to applied magnetic field in case of Paramagnetic material. If the object is heated, the magnetization is viewed to be inversely proportional to the temperature.
CG PET- 2009
Magnetism and Matter
154358
A curve between magnetic moment and temperature of magnet is
1
2
3
4
Explanation:
C Curie temperature is the temperature at which a magnetic substance loses its magnetism (magnetic moment become zero). The magnetic moment in option (c) varies with temperature in such a way that magnetic moment decreases with increase in temperature and at Currie temperature magnetic moment will become zero. Hence, the point of intersection of curve with the ' $T$ ' axis is the curie's temperature.
BITSAT-2006
Magnetism and Matter
154372
The unit of permeability of Vacuum $\left(\mu_{0}\right)$ is
1 $\frac{\mathrm{N}}{\mathrm{A}}$
2 $\frac{\mathrm{N}}{\mathrm{A}^{2}}$
3 NA
4 $\frac{\mathrm{J}}{\mathrm{A}^{2}}$
Explanation:
B Magnetic field, $B=\frac{\mu_{0}}{2 \pi} \times \frac{i}{R}$ or $\mu_{0}=\frac{2 \pi \times B \times R}{i}$ $\therefore$ The unit of $\mu_{0}=\frac{\mathrm{B} \times \mathrm{R}}{\mathrm{i}}$ $=\frac{\mathrm{NA}^{-1} \mathrm{~m}^{-1} \times \mathrm{m}}{\mathrm{A}}$ $=\frac{\text { Newton }}{(\text { Ampere })^{2}}=\frac{\mathrm{N}}{\mathrm{A}^{2}}$
GUJCET 2014
Magnetism and Matter
154374
The magnetic properties of a magnet is lost at its
1 melting point
2 boiling point
3 Curie point
4 triple point
Explanation:
C Curie's law states that in a paramagnetic material the materials magnetization is inversely proportional to the absolute temperature. $\chi=\frac{\mu_{0} \mathrm{C}}{\mathrm{T}}$ All the magnetic material lost their magnetic properties when they are heated above Curie point.
154356
Curie law $\chi T=$ constant, relating magnetic susceptibility $(\chi)$ and absolute temperature $(T)$ of magnetic substances, is obeyed by
1 all magnetic substances
2 paramagnetic substances
3 diamagnetic substances
4 None of the above
Explanation:
B According to Curie's law- $\chi \mathrm{T}=\text { constant }$ It is obeyed by paramagnetic substances. Where, $\chi=$ magnetic susceptibility $\mathrm{T}=\text { absolute temperature }$ Curie's law- It states that the material magnetization is directly proportional to applied magnetic field in case of Paramagnetic material. If the object is heated, the magnetization is viewed to be inversely proportional to the temperature.
CG PET- 2009
Magnetism and Matter
154358
A curve between magnetic moment and temperature of magnet is
1
2
3
4
Explanation:
C Curie temperature is the temperature at which a magnetic substance loses its magnetism (magnetic moment become zero). The magnetic moment in option (c) varies with temperature in such a way that magnetic moment decreases with increase in temperature and at Currie temperature magnetic moment will become zero. Hence, the point of intersection of curve with the ' $T$ ' axis is the curie's temperature.
BITSAT-2006
Magnetism and Matter
154372
The unit of permeability of Vacuum $\left(\mu_{0}\right)$ is
1 $\frac{\mathrm{N}}{\mathrm{A}}$
2 $\frac{\mathrm{N}}{\mathrm{A}^{2}}$
3 NA
4 $\frac{\mathrm{J}}{\mathrm{A}^{2}}$
Explanation:
B Magnetic field, $B=\frac{\mu_{0}}{2 \pi} \times \frac{i}{R}$ or $\mu_{0}=\frac{2 \pi \times B \times R}{i}$ $\therefore$ The unit of $\mu_{0}=\frac{\mathrm{B} \times \mathrm{R}}{\mathrm{i}}$ $=\frac{\mathrm{NA}^{-1} \mathrm{~m}^{-1} \times \mathrm{m}}{\mathrm{A}}$ $=\frac{\text { Newton }}{(\text { Ampere })^{2}}=\frac{\mathrm{N}}{\mathrm{A}^{2}}$
GUJCET 2014
Magnetism and Matter
154374
The magnetic properties of a magnet is lost at its
1 melting point
2 boiling point
3 Curie point
4 triple point
Explanation:
C Curie's law states that in a paramagnetic material the materials magnetization is inversely proportional to the absolute temperature. $\chi=\frac{\mu_{0} \mathrm{C}}{\mathrm{T}}$ All the magnetic material lost their magnetic properties when they are heated above Curie point.
