154387
A paramagnetic substance is placed in a weak magnetic field and its absolute temperature $T$ is increased. As a result, its magnetisation
1 increases in proportion to $\mathrm{T}$
2 decreases in proportion to $\frac{1}{\mathrm{~T}}$
3 increases in proportion to $T^{2}$
4 decreases in proportion to $\frac{1}{\mathrm{~T}^{2}}$
Explanation:
B The magnetization, $\mathrm{I} \propto \frac{1}{\mathrm{~T}}$ Hence, as temperature increases the magnetization decreases.
BCECE-2009
Magnetism and Matter
154388
A ferromagnetic material is heated above its curie temperature. Which one is a correct statement?
1 Ferromagnetic domains are perfectly arranged
2 Ferromagnetic domains become random
3 Ferromagnetic domains are not influenced
4 Ferromagnetic material changes into diamagnetic material
Explanation:
B Beyond Curie temperature, ferromagnetic material turns into paramagnetic material, as if ferromagnetic domains become random.
BCECE-2011
Magnetism and Matter
154390
A material is placed in a magnetic field and it is thrown out of it. Then the material is-
1 paramagnetic
2 diamagnetic
3 ferromagnetic
4 non-magnetic
Explanation:
B Diamagnetic materials are repelled by the magnetic field. Therefore, the above material must be diamagnetic. Diamagnetic material is as zinc, bismuth, copper etc.
BCECE-2011
Magnetism and Matter
154391
If a magnetic material moves from stronger to weaker parts of magnetic field, then it is known as:
1 anti-ferromagnetic
2 ferromagnetic
3 diamagnetic
4 paramagnetic
Explanation:
C Diamagnetic materials get magnetized in the opposite direction to the external magnetic field. Therefore they have a tendency to move away from stronger to weaker part of the field. Permeability of diamagnetic material has low permeability. It permeability is less than unit. Diamagnetic materials are zinc, bismuth, gold, silver, water, copper, salt etc.
154387
A paramagnetic substance is placed in a weak magnetic field and its absolute temperature $T$ is increased. As a result, its magnetisation
1 increases in proportion to $\mathrm{T}$
2 decreases in proportion to $\frac{1}{\mathrm{~T}}$
3 increases in proportion to $T^{2}$
4 decreases in proportion to $\frac{1}{\mathrm{~T}^{2}}$
Explanation:
B The magnetization, $\mathrm{I} \propto \frac{1}{\mathrm{~T}}$ Hence, as temperature increases the magnetization decreases.
BCECE-2009
Magnetism and Matter
154388
A ferromagnetic material is heated above its curie temperature. Which one is a correct statement?
1 Ferromagnetic domains are perfectly arranged
2 Ferromagnetic domains become random
3 Ferromagnetic domains are not influenced
4 Ferromagnetic material changes into diamagnetic material
Explanation:
B Beyond Curie temperature, ferromagnetic material turns into paramagnetic material, as if ferromagnetic domains become random.
BCECE-2011
Magnetism and Matter
154390
A material is placed in a magnetic field and it is thrown out of it. Then the material is-
1 paramagnetic
2 diamagnetic
3 ferromagnetic
4 non-magnetic
Explanation:
B Diamagnetic materials are repelled by the magnetic field. Therefore, the above material must be diamagnetic. Diamagnetic material is as zinc, bismuth, copper etc.
BCECE-2011
Magnetism and Matter
154391
If a magnetic material moves from stronger to weaker parts of magnetic field, then it is known as:
1 anti-ferromagnetic
2 ferromagnetic
3 diamagnetic
4 paramagnetic
Explanation:
C Diamagnetic materials get magnetized in the opposite direction to the external magnetic field. Therefore they have a tendency to move away from stronger to weaker part of the field. Permeability of diamagnetic material has low permeability. It permeability is less than unit. Diamagnetic materials are zinc, bismuth, gold, silver, water, copper, salt etc.
154387
A paramagnetic substance is placed in a weak magnetic field and its absolute temperature $T$ is increased. As a result, its magnetisation
1 increases in proportion to $\mathrm{T}$
2 decreases in proportion to $\frac{1}{\mathrm{~T}}$
3 increases in proportion to $T^{2}$
4 decreases in proportion to $\frac{1}{\mathrm{~T}^{2}}$
Explanation:
B The magnetization, $\mathrm{I} \propto \frac{1}{\mathrm{~T}}$ Hence, as temperature increases the magnetization decreases.
BCECE-2009
Magnetism and Matter
154388
A ferromagnetic material is heated above its curie temperature. Which one is a correct statement?
1 Ferromagnetic domains are perfectly arranged
2 Ferromagnetic domains become random
3 Ferromagnetic domains are not influenced
4 Ferromagnetic material changes into diamagnetic material
Explanation:
B Beyond Curie temperature, ferromagnetic material turns into paramagnetic material, as if ferromagnetic domains become random.
BCECE-2011
Magnetism and Matter
154390
A material is placed in a magnetic field and it is thrown out of it. Then the material is-
1 paramagnetic
2 diamagnetic
3 ferromagnetic
4 non-magnetic
Explanation:
B Diamagnetic materials are repelled by the magnetic field. Therefore, the above material must be diamagnetic. Diamagnetic material is as zinc, bismuth, copper etc.
BCECE-2011
Magnetism and Matter
154391
If a magnetic material moves from stronger to weaker parts of magnetic field, then it is known as:
1 anti-ferromagnetic
2 ferromagnetic
3 diamagnetic
4 paramagnetic
Explanation:
C Diamagnetic materials get magnetized in the opposite direction to the external magnetic field. Therefore they have a tendency to move away from stronger to weaker part of the field. Permeability of diamagnetic material has low permeability. It permeability is less than unit. Diamagnetic materials are zinc, bismuth, gold, silver, water, copper, salt etc.
154387
A paramagnetic substance is placed in a weak magnetic field and its absolute temperature $T$ is increased. As a result, its magnetisation
1 increases in proportion to $\mathrm{T}$
2 decreases in proportion to $\frac{1}{\mathrm{~T}}$
3 increases in proportion to $T^{2}$
4 decreases in proportion to $\frac{1}{\mathrm{~T}^{2}}$
Explanation:
B The magnetization, $\mathrm{I} \propto \frac{1}{\mathrm{~T}}$ Hence, as temperature increases the magnetization decreases.
BCECE-2009
Magnetism and Matter
154388
A ferromagnetic material is heated above its curie temperature. Which one is a correct statement?
1 Ferromagnetic domains are perfectly arranged
2 Ferromagnetic domains become random
3 Ferromagnetic domains are not influenced
4 Ferromagnetic material changes into diamagnetic material
Explanation:
B Beyond Curie temperature, ferromagnetic material turns into paramagnetic material, as if ferromagnetic domains become random.
BCECE-2011
Magnetism and Matter
154390
A material is placed in a magnetic field and it is thrown out of it. Then the material is-
1 paramagnetic
2 diamagnetic
3 ferromagnetic
4 non-magnetic
Explanation:
B Diamagnetic materials are repelled by the magnetic field. Therefore, the above material must be diamagnetic. Diamagnetic material is as zinc, bismuth, copper etc.
BCECE-2011
Magnetism and Matter
154391
If a magnetic material moves from stronger to weaker parts of magnetic field, then it is known as:
1 anti-ferromagnetic
2 ferromagnetic
3 diamagnetic
4 paramagnetic
Explanation:
C Diamagnetic materials get magnetized in the opposite direction to the external magnetic field. Therefore they have a tendency to move away from stronger to weaker part of the field. Permeability of diamagnetic material has low permeability. It permeability is less than unit. Diamagnetic materials are zinc, bismuth, gold, silver, water, copper, salt etc.
