154378
Liquid oxygen remains suspended between two pole forces of a magnet because it is :
1 diamagnetic
2 paramagnetic
3 ferromagnetic
4 antiferromagnetic
Explanation:
B Oxygen is paramagnetic in nature where it is attracted both by North pole or South pole. When it is placed exactly between two magnetic poles, the forces acting on it due to magnetic poles will be equal and opposite. Therefore, liquid oxygen remains suspended between two pole forces of a magnet.
AIIMS-2004
Magnetism and Matter
154401
When a metallic plate swings between the poles of a magnet
1 no effect on the plate
2 eddy currents are set up inside the plate and the direction of the current is along the motion of the plate
3 eddy currents are set up inside the plate and the direction of the current oppose the motion of the plate
4 eddy currents are set up inside the plate
Explanation:
C When a metallic plate swings between the pole of a magnet then eddy current are setup inside the plate and the direction of the current oppose the motion of the plate. So, option (c) is correct
VITEEE-2008
Magnetism and Matter
154382
The materials suitable for making electromagnets should have
1 high retentivity and low coercivity
2 low retentivity and low coercivity
3 high retentivity and high coercivity
4 low retentivity and high coercivity
Explanation:
B The coercivity of an electromagnet should be low because if the coercivity is high then it will be difficult to control the magnetic field of the electromagnet. The retentivity of an electromagnet should be low so that after removing the electric current from the substance. It does not get magnetized and return to its original state.
AIIMS-2013
Magnetism and Matter
154383
What happens, when a magnetic substance is heated?
1 It loses its magnetism
2 It becomes a strong magnet
3 It does not affect the magnetism
4 Either (b) and (c)
Explanation:
A All magnetic materials lose their magnetism if heated above a point temperature known as the Curie temperature because all the atomic magnet becomes randomly oriented due to heat.
AIIMS-1999
Magnetism and Matter
154384
Domain formation is the necessary feature of:
1 ferromagnetism
2 diamagnetism
3 paramagnetism
4 all of these
Explanation:
A Ferromagnetism materials exhibit a long range ordering phenomenon at the atomic level which causes the unpaired electrons spins to line up parallel with each other in a region called domain. within the domain, the magnetic field is high, but in a bulk sample the material will usually be unmagnetised because most of domains will themselves be randomly oriented with respect to one another. Therefore, domain formation is the necessary feature of ferromagnetic substance.
154378
Liquid oxygen remains suspended between two pole forces of a magnet because it is :
1 diamagnetic
2 paramagnetic
3 ferromagnetic
4 antiferromagnetic
Explanation:
B Oxygen is paramagnetic in nature where it is attracted both by North pole or South pole. When it is placed exactly between two magnetic poles, the forces acting on it due to magnetic poles will be equal and opposite. Therefore, liquid oxygen remains suspended between two pole forces of a magnet.
AIIMS-2004
Magnetism and Matter
154401
When a metallic plate swings between the poles of a magnet
1 no effect on the plate
2 eddy currents are set up inside the plate and the direction of the current is along the motion of the plate
3 eddy currents are set up inside the plate and the direction of the current oppose the motion of the plate
4 eddy currents are set up inside the plate
Explanation:
C When a metallic plate swings between the pole of a magnet then eddy current are setup inside the plate and the direction of the current oppose the motion of the plate. So, option (c) is correct
VITEEE-2008
Magnetism and Matter
154382
The materials suitable for making electromagnets should have
1 high retentivity and low coercivity
2 low retentivity and low coercivity
3 high retentivity and high coercivity
4 low retentivity and high coercivity
Explanation:
B The coercivity of an electromagnet should be low because if the coercivity is high then it will be difficult to control the magnetic field of the electromagnet. The retentivity of an electromagnet should be low so that after removing the electric current from the substance. It does not get magnetized and return to its original state.
AIIMS-2013
Magnetism and Matter
154383
What happens, when a magnetic substance is heated?
1 It loses its magnetism
2 It becomes a strong magnet
3 It does not affect the magnetism
4 Either (b) and (c)
Explanation:
A All magnetic materials lose their magnetism if heated above a point temperature known as the Curie temperature because all the atomic magnet becomes randomly oriented due to heat.
AIIMS-1999
Magnetism and Matter
154384
Domain formation is the necessary feature of:
1 ferromagnetism
2 diamagnetism
3 paramagnetism
4 all of these
Explanation:
A Ferromagnetism materials exhibit a long range ordering phenomenon at the atomic level which causes the unpaired electrons spins to line up parallel with each other in a region called domain. within the domain, the magnetic field is high, but in a bulk sample the material will usually be unmagnetised because most of domains will themselves be randomly oriented with respect to one another. Therefore, domain formation is the necessary feature of ferromagnetic substance.
154378
Liquid oxygen remains suspended between two pole forces of a magnet because it is :
1 diamagnetic
2 paramagnetic
3 ferromagnetic
4 antiferromagnetic
Explanation:
B Oxygen is paramagnetic in nature where it is attracted both by North pole or South pole. When it is placed exactly between two magnetic poles, the forces acting on it due to magnetic poles will be equal and opposite. Therefore, liquid oxygen remains suspended between two pole forces of a magnet.
AIIMS-2004
Magnetism and Matter
154401
When a metallic plate swings between the poles of a magnet
1 no effect on the plate
2 eddy currents are set up inside the plate and the direction of the current is along the motion of the plate
3 eddy currents are set up inside the plate and the direction of the current oppose the motion of the plate
4 eddy currents are set up inside the plate
Explanation:
C When a metallic plate swings between the pole of a magnet then eddy current are setup inside the plate and the direction of the current oppose the motion of the plate. So, option (c) is correct
VITEEE-2008
Magnetism and Matter
154382
The materials suitable for making electromagnets should have
1 high retentivity and low coercivity
2 low retentivity and low coercivity
3 high retentivity and high coercivity
4 low retentivity and high coercivity
Explanation:
B The coercivity of an electromagnet should be low because if the coercivity is high then it will be difficult to control the magnetic field of the electromagnet. The retentivity of an electromagnet should be low so that after removing the electric current from the substance. It does not get magnetized and return to its original state.
AIIMS-2013
Magnetism and Matter
154383
What happens, when a magnetic substance is heated?
1 It loses its magnetism
2 It becomes a strong magnet
3 It does not affect the magnetism
4 Either (b) and (c)
Explanation:
A All magnetic materials lose their magnetism if heated above a point temperature known as the Curie temperature because all the atomic magnet becomes randomly oriented due to heat.
AIIMS-1999
Magnetism and Matter
154384
Domain formation is the necessary feature of:
1 ferromagnetism
2 diamagnetism
3 paramagnetism
4 all of these
Explanation:
A Ferromagnetism materials exhibit a long range ordering phenomenon at the atomic level which causes the unpaired electrons spins to line up parallel with each other in a region called domain. within the domain, the magnetic field is high, but in a bulk sample the material will usually be unmagnetised because most of domains will themselves be randomly oriented with respect to one another. Therefore, domain formation is the necessary feature of ferromagnetic substance.
154378
Liquid oxygen remains suspended between two pole forces of a magnet because it is :
1 diamagnetic
2 paramagnetic
3 ferromagnetic
4 antiferromagnetic
Explanation:
B Oxygen is paramagnetic in nature where it is attracted both by North pole or South pole. When it is placed exactly between two magnetic poles, the forces acting on it due to magnetic poles will be equal and opposite. Therefore, liquid oxygen remains suspended between two pole forces of a magnet.
AIIMS-2004
Magnetism and Matter
154401
When a metallic plate swings between the poles of a magnet
1 no effect on the plate
2 eddy currents are set up inside the plate and the direction of the current is along the motion of the plate
3 eddy currents are set up inside the plate and the direction of the current oppose the motion of the plate
4 eddy currents are set up inside the plate
Explanation:
C When a metallic plate swings between the pole of a magnet then eddy current are setup inside the plate and the direction of the current oppose the motion of the plate. So, option (c) is correct
VITEEE-2008
Magnetism and Matter
154382
The materials suitable for making electromagnets should have
1 high retentivity and low coercivity
2 low retentivity and low coercivity
3 high retentivity and high coercivity
4 low retentivity and high coercivity
Explanation:
B The coercivity of an electromagnet should be low because if the coercivity is high then it will be difficult to control the magnetic field of the electromagnet. The retentivity of an electromagnet should be low so that after removing the electric current from the substance. It does not get magnetized and return to its original state.
AIIMS-2013
Magnetism and Matter
154383
What happens, when a magnetic substance is heated?
1 It loses its magnetism
2 It becomes a strong magnet
3 It does not affect the magnetism
4 Either (b) and (c)
Explanation:
A All magnetic materials lose their magnetism if heated above a point temperature known as the Curie temperature because all the atomic magnet becomes randomly oriented due to heat.
AIIMS-1999
Magnetism and Matter
154384
Domain formation is the necessary feature of:
1 ferromagnetism
2 diamagnetism
3 paramagnetism
4 all of these
Explanation:
A Ferromagnetism materials exhibit a long range ordering phenomenon at the atomic level which causes the unpaired electrons spins to line up parallel with each other in a region called domain. within the domain, the magnetic field is high, but in a bulk sample the material will usually be unmagnetised because most of domains will themselves be randomly oriented with respect to one another. Therefore, domain formation is the necessary feature of ferromagnetic substance.
154378
Liquid oxygen remains suspended between two pole forces of a magnet because it is :
1 diamagnetic
2 paramagnetic
3 ferromagnetic
4 antiferromagnetic
Explanation:
B Oxygen is paramagnetic in nature where it is attracted both by North pole or South pole. When it is placed exactly between two magnetic poles, the forces acting on it due to magnetic poles will be equal and opposite. Therefore, liquid oxygen remains suspended between two pole forces of a magnet.
AIIMS-2004
Magnetism and Matter
154401
When a metallic plate swings between the poles of a magnet
1 no effect on the plate
2 eddy currents are set up inside the plate and the direction of the current is along the motion of the plate
3 eddy currents are set up inside the plate and the direction of the current oppose the motion of the plate
4 eddy currents are set up inside the plate
Explanation:
C When a metallic plate swings between the pole of a magnet then eddy current are setup inside the plate and the direction of the current oppose the motion of the plate. So, option (c) is correct
VITEEE-2008
Magnetism and Matter
154382
The materials suitable for making electromagnets should have
1 high retentivity and low coercivity
2 low retentivity and low coercivity
3 high retentivity and high coercivity
4 low retentivity and high coercivity
Explanation:
B The coercivity of an electromagnet should be low because if the coercivity is high then it will be difficult to control the magnetic field of the electromagnet. The retentivity of an electromagnet should be low so that after removing the electric current from the substance. It does not get magnetized and return to its original state.
AIIMS-2013
Magnetism and Matter
154383
What happens, when a magnetic substance is heated?
1 It loses its magnetism
2 It becomes a strong magnet
3 It does not affect the magnetism
4 Either (b) and (c)
Explanation:
A All magnetic materials lose their magnetism if heated above a point temperature known as the Curie temperature because all the atomic magnet becomes randomly oriented due to heat.
AIIMS-1999
Magnetism and Matter
154384
Domain formation is the necessary feature of:
1 ferromagnetism
2 diamagnetism
3 paramagnetism
4 all of these
Explanation:
A Ferromagnetism materials exhibit a long range ordering phenomenon at the atomic level which causes the unpaired electrons spins to line up parallel with each other in a region called domain. within the domain, the magnetic field is high, but in a bulk sample the material will usually be unmagnetised because most of domains will themselves be randomly oriented with respect to one another. Therefore, domain formation is the necessary feature of ferromagnetic substance.
