154403
Permanent magnets are those substances that.
1 retain their ferromagnetic property for a long time at room temperature
2 retain their ferromagnetic property for a long time at all temperature
3 have high permeability and low retentively at room temperature
4 high coercivity and low retentivity at room temperature
Explanation:
A Permanent magnet which at room temperature retain their ferromagnetic properties for a long period of time which get strongly magnetized when placed in an external magnetic field.
SCRA-2014
Magnetism and Matter
154406
A piece of magnet having length $L$ and pole strength $\mathrm{m}$ in magnetized by subjecting it to a uniform magnetic field. The piece is then transversely cut into three pieces. Then the intensity of magnetization will:
1 be one-third that of original piece
2 be three times that of original piece
3 remain same
4 be one-ninth of original piece
Explanation:
C When any magnet cut perpendicular or transverse then pole strength or intensity of manetization remains same.
SCRA-2011
Magnetism and Matter
154407
Consider the following statements: 1.Magnetisation can be increased without limit by applying strong magnetizing fields. 2.Magnetisation is maximum at $0 \mathrm{~K}$. Which of the statements given above is/are correct in respect of a ferromagnetic material?
1 1 only
2 2 only
3 Both 1 and 2
4 Neither 1 nor 2
Explanation:
C Magnetization can be increased without limit by applying strong magnetizing field magnetization is maximum at $0^{\circ} \mathrm{K}$ when temperature is increase then magnetic properties loss by magnet. So, both 1 and 2 statements are correct.
SCRA-2010
Magnetism and Matter
154410
There is a uniform magnetic field directed perpendicular and into the plane of the paper. An irregular shaped conducting loop in the plane of the paper. Then
1 current is induced in the loop in the anticlockwise direction
2 current is induced in the loop in the clockwise direction
3 AC is induced in the loop
4 no current is induced in the loop
Explanation:
A Because due to change in the shape of the loop the magnetic flux with the loop increase. Hence, current is induced in the loop in such a direction that it opposes the increase in flux. Therefore induced current flow in the anticlockwise direction.
Karnataka CET-2010
Magnetism and Matter
154415
Curie-Weiss law is obeyed by iron at a temperature :
1 at Curie temperature only
2 at all temperatures
3 below Curie temperature
4 above Curie temperature
Explanation:
D The susceptibility of a ferromagnetic material decreases above a certain temperature called Curie temperature and it becomes paramagnetic in nature. So, Curie-Weiss law is obey by iron at above Curie temperature.
154403
Permanent magnets are those substances that.
1 retain their ferromagnetic property for a long time at room temperature
2 retain their ferromagnetic property for a long time at all temperature
3 have high permeability and low retentively at room temperature
4 high coercivity and low retentivity at room temperature
Explanation:
A Permanent magnet which at room temperature retain their ferromagnetic properties for a long period of time which get strongly magnetized when placed in an external magnetic field.
SCRA-2014
Magnetism and Matter
154406
A piece of magnet having length $L$ and pole strength $\mathrm{m}$ in magnetized by subjecting it to a uniform magnetic field. The piece is then transversely cut into three pieces. Then the intensity of magnetization will:
1 be one-third that of original piece
2 be three times that of original piece
3 remain same
4 be one-ninth of original piece
Explanation:
C When any magnet cut perpendicular or transverse then pole strength or intensity of manetization remains same.
SCRA-2011
Magnetism and Matter
154407
Consider the following statements: 1.Magnetisation can be increased without limit by applying strong magnetizing fields. 2.Magnetisation is maximum at $0 \mathrm{~K}$. Which of the statements given above is/are correct in respect of a ferromagnetic material?
1 1 only
2 2 only
3 Both 1 and 2
4 Neither 1 nor 2
Explanation:
C Magnetization can be increased without limit by applying strong magnetizing field magnetization is maximum at $0^{\circ} \mathrm{K}$ when temperature is increase then magnetic properties loss by magnet. So, both 1 and 2 statements are correct.
SCRA-2010
Magnetism and Matter
154410
There is a uniform magnetic field directed perpendicular and into the plane of the paper. An irregular shaped conducting loop in the plane of the paper. Then
1 current is induced in the loop in the anticlockwise direction
2 current is induced in the loop in the clockwise direction
3 AC is induced in the loop
4 no current is induced in the loop
Explanation:
A Because due to change in the shape of the loop the magnetic flux with the loop increase. Hence, current is induced in the loop in such a direction that it opposes the increase in flux. Therefore induced current flow in the anticlockwise direction.
Karnataka CET-2010
Magnetism and Matter
154415
Curie-Weiss law is obeyed by iron at a temperature :
1 at Curie temperature only
2 at all temperatures
3 below Curie temperature
4 above Curie temperature
Explanation:
D The susceptibility of a ferromagnetic material decreases above a certain temperature called Curie temperature and it becomes paramagnetic in nature. So, Curie-Weiss law is obey by iron at above Curie temperature.
154403
Permanent magnets are those substances that.
1 retain their ferromagnetic property for a long time at room temperature
2 retain their ferromagnetic property for a long time at all temperature
3 have high permeability and low retentively at room temperature
4 high coercivity and low retentivity at room temperature
Explanation:
A Permanent magnet which at room temperature retain their ferromagnetic properties for a long period of time which get strongly magnetized when placed in an external magnetic field.
SCRA-2014
Magnetism and Matter
154406
A piece of magnet having length $L$ and pole strength $\mathrm{m}$ in magnetized by subjecting it to a uniform magnetic field. The piece is then transversely cut into three pieces. Then the intensity of magnetization will:
1 be one-third that of original piece
2 be three times that of original piece
3 remain same
4 be one-ninth of original piece
Explanation:
C When any magnet cut perpendicular or transverse then pole strength or intensity of manetization remains same.
SCRA-2011
Magnetism and Matter
154407
Consider the following statements: 1.Magnetisation can be increased without limit by applying strong magnetizing fields. 2.Magnetisation is maximum at $0 \mathrm{~K}$. Which of the statements given above is/are correct in respect of a ferromagnetic material?
1 1 only
2 2 only
3 Both 1 and 2
4 Neither 1 nor 2
Explanation:
C Magnetization can be increased without limit by applying strong magnetizing field magnetization is maximum at $0^{\circ} \mathrm{K}$ when temperature is increase then magnetic properties loss by magnet. So, both 1 and 2 statements are correct.
SCRA-2010
Magnetism and Matter
154410
There is a uniform magnetic field directed perpendicular and into the plane of the paper. An irregular shaped conducting loop in the plane of the paper. Then
1 current is induced in the loop in the anticlockwise direction
2 current is induced in the loop in the clockwise direction
3 AC is induced in the loop
4 no current is induced in the loop
Explanation:
A Because due to change in the shape of the loop the magnetic flux with the loop increase. Hence, current is induced in the loop in such a direction that it opposes the increase in flux. Therefore induced current flow in the anticlockwise direction.
Karnataka CET-2010
Magnetism and Matter
154415
Curie-Weiss law is obeyed by iron at a temperature :
1 at Curie temperature only
2 at all temperatures
3 below Curie temperature
4 above Curie temperature
Explanation:
D The susceptibility of a ferromagnetic material decreases above a certain temperature called Curie temperature and it becomes paramagnetic in nature. So, Curie-Weiss law is obey by iron at above Curie temperature.
154403
Permanent magnets are those substances that.
1 retain their ferromagnetic property for a long time at room temperature
2 retain their ferromagnetic property for a long time at all temperature
3 have high permeability and low retentively at room temperature
4 high coercivity and low retentivity at room temperature
Explanation:
A Permanent magnet which at room temperature retain their ferromagnetic properties for a long period of time which get strongly magnetized when placed in an external magnetic field.
SCRA-2014
Magnetism and Matter
154406
A piece of magnet having length $L$ and pole strength $\mathrm{m}$ in magnetized by subjecting it to a uniform magnetic field. The piece is then transversely cut into three pieces. Then the intensity of magnetization will:
1 be one-third that of original piece
2 be three times that of original piece
3 remain same
4 be one-ninth of original piece
Explanation:
C When any magnet cut perpendicular or transverse then pole strength or intensity of manetization remains same.
SCRA-2011
Magnetism and Matter
154407
Consider the following statements: 1.Magnetisation can be increased without limit by applying strong magnetizing fields. 2.Magnetisation is maximum at $0 \mathrm{~K}$. Which of the statements given above is/are correct in respect of a ferromagnetic material?
1 1 only
2 2 only
3 Both 1 and 2
4 Neither 1 nor 2
Explanation:
C Magnetization can be increased without limit by applying strong magnetizing field magnetization is maximum at $0^{\circ} \mathrm{K}$ when temperature is increase then magnetic properties loss by magnet. So, both 1 and 2 statements are correct.
SCRA-2010
Magnetism and Matter
154410
There is a uniform magnetic field directed perpendicular and into the plane of the paper. An irregular shaped conducting loop in the plane of the paper. Then
1 current is induced in the loop in the anticlockwise direction
2 current is induced in the loop in the clockwise direction
3 AC is induced in the loop
4 no current is induced in the loop
Explanation:
A Because due to change in the shape of the loop the magnetic flux with the loop increase. Hence, current is induced in the loop in such a direction that it opposes the increase in flux. Therefore induced current flow in the anticlockwise direction.
Karnataka CET-2010
Magnetism and Matter
154415
Curie-Weiss law is obeyed by iron at a temperature :
1 at Curie temperature only
2 at all temperatures
3 below Curie temperature
4 above Curie temperature
Explanation:
D The susceptibility of a ferromagnetic material decreases above a certain temperature called Curie temperature and it becomes paramagnetic in nature. So, Curie-Weiss law is obey by iron at above Curie temperature.
154403
Permanent magnets are those substances that.
1 retain their ferromagnetic property for a long time at room temperature
2 retain their ferromagnetic property for a long time at all temperature
3 have high permeability and low retentively at room temperature
4 high coercivity and low retentivity at room temperature
Explanation:
A Permanent magnet which at room temperature retain their ferromagnetic properties for a long period of time which get strongly magnetized when placed in an external magnetic field.
SCRA-2014
Magnetism and Matter
154406
A piece of magnet having length $L$ and pole strength $\mathrm{m}$ in magnetized by subjecting it to a uniform magnetic field. The piece is then transversely cut into three pieces. Then the intensity of magnetization will:
1 be one-third that of original piece
2 be three times that of original piece
3 remain same
4 be one-ninth of original piece
Explanation:
C When any magnet cut perpendicular or transverse then pole strength or intensity of manetization remains same.
SCRA-2011
Magnetism and Matter
154407
Consider the following statements: 1.Magnetisation can be increased without limit by applying strong magnetizing fields. 2.Magnetisation is maximum at $0 \mathrm{~K}$. Which of the statements given above is/are correct in respect of a ferromagnetic material?
1 1 only
2 2 only
3 Both 1 and 2
4 Neither 1 nor 2
Explanation:
C Magnetization can be increased without limit by applying strong magnetizing field magnetization is maximum at $0^{\circ} \mathrm{K}$ when temperature is increase then magnetic properties loss by magnet. So, both 1 and 2 statements are correct.
SCRA-2010
Magnetism and Matter
154410
There is a uniform magnetic field directed perpendicular and into the plane of the paper. An irregular shaped conducting loop in the plane of the paper. Then
1 current is induced in the loop in the anticlockwise direction
2 current is induced in the loop in the clockwise direction
3 AC is induced in the loop
4 no current is induced in the loop
Explanation:
A Because due to change in the shape of the loop the magnetic flux with the loop increase. Hence, current is induced in the loop in such a direction that it opposes the increase in flux. Therefore induced current flow in the anticlockwise direction.
Karnataka CET-2010
Magnetism and Matter
154415
Curie-Weiss law is obeyed by iron at a temperature :
1 at Curie temperature only
2 at all temperatures
3 below Curie temperature
4 above Curie temperature
Explanation:
D The susceptibility of a ferromagnetic material decreases above a certain temperature called Curie temperature and it becomes paramagnetic in nature. So, Curie-Weiss law is obey by iron at above Curie temperature.
