If a ferromagnetic material is heated upto Curie temperature, it becomes

If a ferromagnetic material is heated upto Curie temperature, it becomes (a) Permanent magnet (b) Anti-ferromagnetic material (c) Diamagnetic material (d) Paramagnetic material 
by

1 Answer

Answer :

Paramagnetic material
by

Related questions

A magnetic material becomes __________ above the Curie temperature. (A) Ferromagnetic (B) Diamagnetic (C) Paramagnetic (D) None of these

Description : A magnetic material becomes __________ above the Curie temperature. (A) Ferromagnetic (B) Diamagnetic (C) Paramagnetic (D) None of these

Last Answer : (C) Paramagnetic

Pick out the wrong statement. (A) A ferromagnetic material becomes paramagnetic above the 'Curie temperature' (B) Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic materials (C) Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and coercive forces (D) Tungsten steel and alnico are not hard magnetic materials

Description : Pick out the wrong statement. (A) A ferromagnetic material becomes paramagnetic above the 'Curie temperature' (B) Permanent magnets are made of hard materials, whereas electromagnets require soft ... hysterisis loss and coercive forces (D) Tungsten steel and alnico are not hard magnetic materials

Last Answer : Option D

When the temperature of a ferromagnetic material exceeds the Curie temperature, it behaves similar to a

Description : When the temperature of a ferromagnetic material exceeds the Curie temperature, it behaves similar to a 

Last Answer : When the temperature of a ferromagnetic material exceeds the Curie temperature, it behaves similar to a Diamagnetic material

The temperature at which ferromagnetic material can no longer be magnetised by the outside forces, is termed as the (A) Critical point (B) Curie temperature (C) Inversion temperature (D) Eutectic temperature

Description : The temperature at which ferromagnetic material can no longer be magnetised by the outside forces, is termed as the (A) Critical point (B) Curie temperature (C) Inversion temperature (D) Eutectic temperature

Last Answer : (B) Curie temperature

Pure nickel is (A) Ferromagnetic above its curie point (i.e., 415°C)(B) Having h.c.p. crystal lattice(C) Ferromagnetic at room temperature(D) Not resistant to oxidation at high temperature

Description : Pure nickel is (A) Ferromagnetic above its curie point (i.e., 415°C) (B) Having h.c.p. crystal lattice (C) Ferromagnetic at room temperature (D) Not resistant to oxidation at high temperature

Last Answer : (C) Ferromagnetic at room temperature

The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the 'Curie temperature'. Its value for cobalt is __________ °C. (A) 768 (B) 1127 (C) 1359 (D) 1480

Description : The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the 'Curie temperature'. Its value for cobalt is __________ °C. (A) 768 (B) 1127 (C) 1359 (D) 1480

Last Answer : (B) 1127

Heating of ferromagnetic materials to a temperature above Curie temperature makes it (A) Insulator for heat & electricity transmission (B) Ferritic (C) Behave like paramagnetic materials (D) Superconductor

Description : Heating of ferromagnetic materials to a temperature above Curie temperature makes it (A) Insulator for heat & electricity transmission (B) Ferritic (C) Behave like paramagnetic materials (D) Superconductor

Last Answer : Option C

The critical temperature above which the ferromagnetic materials loose their magnetic property is known as (A) hysterisis. (B) Curie point. (C) transition temperature. (D) standard temperature.

Description : The critical temperature above which the ferromagnetic materials loose their magnetic property is known as (A) hysterisis. (B) Curie point. (C) transition temperature. (D) standard temperature.

Last Answer : (B) Curie point

In a ferromagnetic material the state of flux density is as follows when external magnetic field is applied to it. (A) Increased (B) Decreased (C) Remains unchanged (D) Becomes zero

Description : In a ferromagnetic material the state of flux density is as follows when external magnetic field is applied to it. (A) Increased (B) Decreased (C) Remains unchanged (D) Becomes zero

Last Answer : (C) Remains unchanged

(a) What happens when a Ferromagnetic or Ferrimagnetic solid is heated ? (b) The ions of MgO and NaF all have the same number of electrons and intermolecular distance are about the same (235 & 215 pm). Why are the melting points are so different (2642 °C & 992 °C ?

Description : (a) What happens when a Ferromagnetic or Ferrimagnetic solid is heated ?  (b) The ions of MgO and NaF all have the same number of electrons and intermolecular distance are about the same (235 & 215 pm). Why are the melting points are so different (2642 °C & 992 °C ?

Last Answer : (a) It changes into paramagnetic at hight temperature due to randomization of spins.  (b) The ions in MgO carry two unit charges. In NaCl only one unit charge. Hence electrostatic forces of attraction in MgO are stronger.

Curie point is the temperature at which (1) Matter becomes radioactive (2) A metal loses magnetic properties (3) A metal loses conductivity (4) Transmutation of metal occurs

Description : Curie point is the temperature at which (1) Matter becomes radioactive (2) A metal loses magnetic properties (3) A metal loses conductivity (4) Transmutation of metal occurs

Last Answer : (2) A metal loses magnetic properties Explanation: In physics and materials science, the Curie temperature (TO, or Curie point, is the temperature at which a ferromagnetic or a ... in piezoelectric materials to refer to the temperature at which spontaneous polarization is lost on heating.

The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the 'Curie point', which is __________ °C. (A) 768 (B) 908 (C) 1400 (D) 1539

Description : The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the 'Curie point', which is __________ °C. (A) 768 (B) 908 (C) 1400 (D) 1539

Last Answer : Option A

Curie point is the temperature at which (1) Matter becomes radioactive (2) A metal loses magnetic properties. (3) A metal loses conductivity (4) Transmutation of metal occurs.

Description : Curie point is the temperature at which (1) Matter becomes radioactive (2) A metal loses magnetic properties. (3) A metal loses conductivity (4) Transmutation of metal occurs.

Last Answer : A metal loses magnetic properties.

The resistance of a silver wire at `0^(@)C " is " 1.25 Omega`. Upto what temperature it must be heated so that its resistance is doubled ? The tempera

Description : The resistance of a silver wire at `0^(@)C " is " 1.25 Omega`. Upto what temperature it must be heated so that its resistance is doubled ? The tempera

Last Answer : The resistance of a silver wire at `0^(@)C " is " 1.25 Omega`. Upto what temperature ... temperature be same for all silver conductors of all shapes ?

The relative permeability of a ferromagnetic material is?

Description : The relative permeability of a ferromagnetic material is?

Last Answer : The relative permeability of a ferromagnetic material is more than 100 or 1000.

With increase in temperature, the thermal conductivity of most liquids (A) Increases (B) Decreases (C) Remain same (D) First increases upto a certain temperature and then becomes constant

Description : With increase in temperature, the thermal conductivity of most liquids (A) Increases (B) Decreases (C) Remain same (D) First increases upto a certain temperature and then becomes constant

Last Answer : (C) Remain same

Nickel as a material of construction (A) Is used as an alloying element for both ferrous & non-ferrous alloys (B) Is paramagnetic below 415° C (its Curie temperature) (C) Diamagnetic (D) Has a body centred cubic (bcc) crystal lattice structure

Description : Nickel as a material of construction (A) Is used as an alloying element for both ferrous & non-ferrous alloys (B) Is paramagnetic below 415° C (its Curie temperature) (C) Diamagnetic (D) Has a body centred cubic (bcc) crystal lattice structure

Last Answer : (A) Is used as an alloying element for both ferrous & non-ferrous alloys

A copper plate has a circular hole cut in it. If the plate is heated to a higher temperature, the diameter of the hole (a) Becomes smaller (b) Increases (c) Remains constant (d) Increases but the total area of the plate remains constant

Description : A copper plate has a circular hole cut in it. If the plate is heated to a higher temperature, the diameter of the hole (a) Becomes smaller (b) Increases (c) Remains constant (d) Increases but the total area of the plate remains constant

Last Answer : Ans:(b)

Which of the following statements concerning the specific gravity of a battery electrolyte is true? A. The electrolyte becomes less dense when it is cooled. B. The specific gravity reading is lowered when the electrolyte is heated. C. The most accurate hydrometer reading is obtained immediately after water is added. D. The temperature does not affect the specific gravity of the electrolyte.

Description : Which of the following statements concerning the specific gravity of a battery electrolyte is true? A. The electrolyte becomes less dense when it is cooled. B. The specific gravity reading is lowered ... water is added. D. The temperature does not affect the specific gravity of the electrolyte.

Last Answer : Answer: B

Nickel is a __________ material. (A) Ferromagnetic (B) Diamagnetic (C) Paramagnetic (D) None of these

Description : Nickel is a __________ material. (A) Ferromagnetic (B) Diamagnetic (C) Paramagnetic (D) None of these

Last Answer : (A) Ferromagnetic

Which of the following is a ferromagnetic material ? A. Tungsten B. Aluminium C. Copper D. Nickel (Answer)

Description : Which of the following is a ferromagnetic material ? A. Tungsten B. Aluminium C. Copper D. Nickel (Answer)

Last Answer : D. Nickel (Answer)

Nickel is a __________ material. (A) Ferromagnetic (B) Semi-conductor (C) Paramagnetic (D) Ferroelectric

Description : Nickel is a __________ material. (A) Ferromagnetic (B) Semi-conductor (C) Paramagnetic (D) Ferroelectric

Last Answer : (A) Ferromagnetic

Quartz is a __________ material. (A) Diamagnetic (B) Ferromagnetic (C) Ferroelectric (D) Piezoelectric

Description : Quartz is a __________ material. (A) Diamagnetic (B) Ferromagnetic (C) Ferroelectric (D) Piezoelectric

Last Answer : Option D

Which of the following is not a ferromagnetic material? (A) Nickel (B) Cobalt (C) Alumini

Description : Which of the following is not a ferromagnetic material? (A) Nickel (B) Cobalt (C) Alumini

Last Answer : Option C

Which of the following is a ferromagnetic material ? (a) Tungsten (b) Aluminium (c) Copper (d) Nickel

Description : Which of the following is a ferromagnetic material ? (a) Tungsten (b) Aluminium (c) Copper (d) Nickel

Last Answer : (d) Nickel

A material which is slightly repelled by a magnetic field is known as (a) ferromagnetic material (b) diamagnetic material (c) paramagnetic material (d) conducting material

Description : A material which is slightly repelled by a magnetic field is known as (a) ferromagnetic material (b) diamagnetic material (c) paramagnetic material (d) conducting material

Last Answer : (b) diamagnetic material

Ferrites are (A) ferromagnetic material. (B) ferrimagnetic materials. (C) anti ferromagnetic material. (D) diamagnetic materials.

Description : Ferrites are (A) ferromagnetic material. (B) ferrimagnetic materials. (C) anti ferromagnetic material. (D) diamagnetic materials.

Last Answer : (A) ferromagnetic material.

Iron is what type of magnetic material? Is it: w) diamagnetic x) paramagnetic y) ferromagnetic z) non-magnetic

Description : Iron is what type of magnetic material? Is it: w) diamagnetic x) paramagnetic y) ferromagnetic z) non-magnetic

Last Answer : ANSWER: Y -- FERROMAGNETIC 

State any two applications of: (i) Ferromagnetic (ii) Paramagnetic material.

Description : State any two applications of: (i) Ferromagnetic (ii) Paramagnetic material. 

Last Answer : Applications of Ferromagnetic Materials:  1. In the transformer laminations. 2. In Electrical machines as a magnetic material. 3. In Magnetic poles of motor and generator 4. Magnetic ... : 1. Solid state MASER  2. Using adiabatic demagnetization low temperature can be achieved. 

Name any THREE of the four elements that are ferromagnetic at room temperature (25 degrees Celsius).

Description : Name any THREE of the four elements that are ferromagnetic at room temperature (25 degrees Celsius).

Last Answer : ANSWER: IRON (FE); COBALT (CO); NICKEL (NI); GADOLINIUM GD)

Kel-F is a material, which is (A) Chemically known as Polychlorotrifluoroethylene (PTFE) (B) Having excellent chemical & high temperature resistance (upto 200°C) (C) Having elastomeric properties (D) All (A), (B) and (C)

Description : Kel-F is a material, which is (A) Chemically known as Polychlorotrifluoroethylene (PTFE) (B) Having excellent chemical & high temperature resistance (upto 200°C) (C) Having elastomeric properties (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Pick out the wrong statement. (A) Alloys are harder than their component elements (B) Presence of silicon in steel decreases its electrical resistance (C) Karbate is an acid resistant material of construction (D) Nichrome, a steel alloyed with 10% Ni and 20% Cr can be used upto a temperature of 1100°C

Description : Pick out the wrong statement. (A) Alloys are harder than their component elements (B) Presence of silicon in steel decreases its electrical resistance (C) Karbate is an acid resistant material of construction ... , a steel alloyed with 10% Ni and 20% Cr can be used upto a temperature of 1100°C

Last Answer : (B) Presence of silicon in steel decreases its electrical resistance

The phenomenon of magnetostriction occurs when a ferromagnetic substance is magnetized resulting in

Description : The phenomenon of magnetostriction occurs when a ferromagnetic substance is magnetized resulting in (a) Heating (b) Small changes in its dimensions (c) Small changes in its crystal structure (d) Some change in its mechanical properties

Last Answer : The phenomenon of magnetostriction occurs when a ferromagnetic substance is magnetized resulting in Small changes in its dimensions 

In ferromagnetic, anti -ferromagnetic and ferrimagnetic materials, the atomic thermal motions counteract...

Description : In ferromagnetic, anti -ferromagnetic and ferrimagnetic materials, the atomic thermal motions counteract the coupling forces between the adjacent atomic dipole moments, thereby causing (a) Some dipole misalignment ... on dipole alignment (d) Atoms tend to de -randomize the direction of moments

Last Answer : In ferromagnetic, anti -ferromagnetic and ferrimagnetic materials, the atomic thermal motions counteract the coupling forces between the adjacent atomic dipole moments, thereby causing Some dipole misalignment regardless of whether an external field is present

When a ferromagnetic substance is magnetized, small changes in dimensions occur. Such a phenomenon is

Description : When a ferromagnetic substance is magnetized, small changes in dimensions occur. Such a phenomenon is known as

Last Answer : When a ferromagnetic substance is magnetized, small changes in dimensions occur. Such a phenomenon is known as Magnetostriction.

The induced emf in a material opposes the flux producing it. This is a) Faraday law b) Ampere law c) Lenz law d) Curie law

Description : The induced emf in a material opposes the flux producing it. This is a) Faraday law b) Ampere law c) Lenz law d) Curie law

Last Answer : c) Lenz law

The snow on the mountains does not melt all at once when it is heated by the sun because _____ A. It becomes very hard It B. It reflects most of the heat from the sun C. It has a low specific heat capacity D. It has a high latent heat of fusion

Description : The snow on the mountains does not melt all at once when it is heated by the sun because _____ A. It becomes very hard It B. It reflects most of the heat from the sun C. It has a low specific heat capacity D. It has a high latent heat of fusion

Last Answer : ANSWER: B

The filament of an electric lamp becomes white hot but the lead-in wires holding the filament are only slightly heated because they (a) have smaller current passing through them (b) have very low resistance (c) have higher melting point (d) are made of black iron

Description : The filament of an electric lamp becomes white hot but the lead-in wires holding the filament are only slightly heated because they (a) have smaller current passing through them (b) have very low resistance (c) have higher melting point (d) are made of black iron

Last Answer : Ans:(b)

The snow on the mountains does NOT melt all at once when it is heated by the sum because: (1) It becomes very hard (2) It reflects most of the heat from the sum (3) it has a low specific heat capacity (4) it has a high latent heat of fusion

Description : The snow on the mountains does NOT melt all at once when it is heated by the sum because: (1) It becomes very hard (2) It reflects most of the heat from the sum (3) it has a low specific heat capacity (4) it has a high latent heat of fusion

Last Answer : (2) It reflects most of the heat from the sum Explanation: Newly formed snow reflects about 90 per cent of the sunlight that falls upon it. This means that the sun is powerless to melt clean snow. And when ... on a spring day because of the sun's heat. It melts because of the warm air from the sea.

The snow on the mountains does NOT melt all at once when it is heated by the sum because: (1) It becomes very hard (2) It reflects most of the heat from the sum (3) it has a low specific heat capacity (4) it has a high latent heat of fusion

Description : The snow on the mountains does NOT melt all at once when it is heated by the sum because: (1) It becomes very hard (2) It reflects most of the heat from the sum (3) it has a low specific heat capacity (4) it has a high latent heat of fusion

Last Answer : (2) It reflects most of the heat from the sum Explanation: Newly formed snow reflects about 90 per cent of the sunlight that falls upon it. This means that the sun is powerless to melt clean snow. And when ... on a spring day because of the sun's heat. It melts because of the warm air from the sea.

In tropical regions, (A) The surface gets heated more effectively than the arctic areas (B) After heating, the air becomes lighter and is displaced by cool air from the polar regions (C) The rising tropical air flows towards the polar region in the upper strata (D) All of the above

Description : In tropical regions, (A) The surface gets heated more effectively than the arctic areas (B) After heating, the air becomes lighter and is displaced by cool air from the polar regions (C) The rising tropical air flows towards the polar region in the upper strata (D) All of the above

Last Answer : (D) All of the above

The snow on the mountains does NOT melt all at once when it is heated by the sun because: (1) it becomes very hard (2) it reflects most of the heat from the sun (3) it has a low specific heat capacity (4) it has a high latent heat of fusion

Description : The snow on the mountains does NOT melt all at once when it is heated by the sun because: (1) it becomes very hard (2) it reflects most of the heat from the sun (3) it has a low specific heat capacity (4) it has a high latent heat of fusion

Last Answer : it reflects most of the heat from the sun

Pick out the wrong statement. (A) The toughness of a material decreases, when it is heated (B) Crane hooks are normally made of wrought iron (C) Cold working of a metal decreases its fatigue strength (D) The temperature at which new grains are formed in a metal is known as the recrystallisation temperature

Description : Pick out the wrong statement. (A) The toughness of a material decreases, when it is heated (B) Crane hooks are normally made of wrought iron (C) Cold working of a metal decreases its ... (D) The temperature at which new grains are formed in a metal is known as the recrystallisation temperature

Last Answer : (C) Cold working of a metal decreases its fatigue strength

A hollow sphere and a solid sphere of the same material and equal radii are heated to the same temperature. In this case, (A) The cooling rate will be the same for the two spheres and hence the two spheres will have equal temperatures at any instant (B) Both the spheres will emit equal amount of radiation per unit time in the beginning (C) Both will absorb equal amount of radiation from the surrounding in the beginning (D) Both (B) & (C)

Description : A hollow sphere and a solid sphere of the same material and equal radii are heated to the same temperature. In this case, (A) The cooling rate will be the same for the two spheres and hence the ... equal amount of radiation from the surrounding in the beginning (D) Both (B) & (C)

Last Answer : (D) Both (B) & (C)

“Curie” is the unit of – (1) radioactivity (2) temperature (3) heat (4) energy

Description : “Curie” is the unit of – (1) radioactivity (2) temperature (3) heat (4) energy

Last Answer : (1) radioactivity Explanation: The curie (Symbol Ci) is a non-SI unit of radioactivity named after Marie and Pierre Curie.

"Curie" is unit of : (1) Radioactivity (2) Temperature (3) Heat (4) Energy

Description : "Curie" is unit of : (1) Radioactivity (2) Temperature (3) Heat (4) Energy

Last Answer : (1) Radioactivity Explanation: Curie, in physics, unit of activity of a quantity of a radioactive substance, named in honour of the French physicist Marie Curie. One curie (1 Ci) is equal ... ). Radioactivity refers to the particles which are emitted from nuclei as a result of nuclear instability.

Find the susceptibility when the curie constant is 0.2 and the difference in critical temperature and paramagnetic curie temperature is 0.01. a) 2 b) 20 c) 0.02 d) 200

Description : Find the susceptibility when the curie constant is 0.2 and the difference in critical temperature and paramagnetic curie temperature is 0.01. a) 2 b) 20 c) 0.02 d) 200

Last Answer : b) 20

Which of the following is NOT closely associated with a non-magnetic Phase Diagram? w) Eutectic Temperature (pron: you-tek-tik) x) Curie Point y) Solidus z) Liquidus Curves

Description : Which of the following is NOT closely associated with a non-magnetic Phase Diagram? w) Eutectic Temperature (pron: you-tek-tik) x) Curie Point y) Solidus z) Liquidus Curves

Last Answer : ANSWER: X -- CURIE POINT

“Curie” is unit of : (1) Radioactivity (2) Temperature (3) Heat (4) Energy

Description : “Curie” is unit of : (1) Radioactivity (2) Temperature (3) Heat (4) Energy

Last Answer : Radioactivity

What are the properties of ferromagnetic substances ?

Description : What are the properties of ferromagnetic substances ?

Last Answer : 1. They are very attracted by magnets. 2. They are solid and crystalline. 3. They have a magnetic field. 4. They have specific curry points. 5. Their magnetism or tendency is very high and positive ... reduced. 10. When placed in a magnetic field, they move from the weaker part to the stronger part.