154471
What happens, when a magnetic substance is heated?
1 Loses magnetism
2 Becomes stronger magnet
3 No effect
4 None of these
Explanation:
A We know that, $M=C \times \frac{B}{T}$ $M \propto \frac{1}{T}$ Where, $\mathrm{T}=$ Curie's temperature If increase the temperature of any magnetic material loose the magnetic property.
BITSAT-2005
Magnetism and Matter
154446
Above Curie temperature
1 a ferromagnetic substance becomes paramagnetic
2 a paramagnetic susbtance becomes diamagnetic
3 a diamagnetic substance becomes paramagnetic
4 a paramagnetic substance becomes ferromagnetic
Explanation:
A Ferromagnetic materials are those materials that are strongly attracted by an external magnetic field. When these materials are placed in an external magnetic field, they get strongly magnetised in the direction of the magnetic field. The magnetising effect remains even after removing the external magnetic field. However, when ferromagnetic materials are heated, they lose their properties and are converted into paramagnetic materials above a certain temperature. This temperature is called Curie temperature. Therefore, Curie temperature is the temperature above which ferromagnetic material becomes paramagnetic material.
CBSE AIPMT- 2006
Magnetism and Matter
154463
The magnetic susceptibility of the material of a rod is 499. Permeability of vacuum is $4 \pi \times 10^{-7}$ $\mathrm{Hm}^{-1}$. Absolute permeability of the material of the $\operatorname{rod}$ in $\mathrm{H} / \mathrm{m}$ is
154464
The speed of electrons in a cathode ray beam, which remains undeflected, in Thomson experiment, under the simultaneously action of a magnetic field $2 \times 10^{-3} \mathrm{Wbm}^{-2}$ and that of an electric field $3.4 \times 10^{4} \mathrm{Vm}^{-1}$ is
1 $1.7 \times 10^{7} \mathrm{~ms}^{-1}$
2 $2.8 \times 10^{7} \mathrm{~ms}^{-1}$
3 $1.2 \times 10^{6} \mathrm{~ms}^{-1}$
4 $54 \times 10^{6} \mathrm{~ms}^{-1}$
Explanation:
A Given, magnetic field (B) $=2 \times 10^{-3} \mathrm{Wbm}^{-2}$ Electric field $(\mathrm{E})=3.4 \times 10^{4} \mathrm{Vm}^{-1}$ In the Thomson experiment, expression for speed of beam of electron is given as, We know that, speed of electron- $\frac{\mathrm{E}}{\mathrm{B}}=\frac{3.4 \times 10^{4}}{2 \times 10^{-3}}=1.7 \times 10^{7} \mathrm{~ms}^{-1}$
AP EAMCET-1993
Magnetism and Matter
154473
Substance which when placed in a magnetic field, acquire feeble magnetization in a direction opposite to that of the applied field are called
1 diamagnetic substances
2 paramagnetic substances
3 ferromagnetic substances
4 ferrimagnetic substances
Explanation:
A Diamagnetic substance are substances that acquire feeble magnetism when placed in a magnetic field and the direction of the induced magnetic field is opposite to that of the applied magnetic field. Ex. bismuth, copper, silver, gold, mercury etc. Thus when a bar of diamagnetic material is placed in external magnetic field, the field lines are repelled or expelled and line inside the material is reduced.
154471
What happens, when a magnetic substance is heated?
1 Loses magnetism
2 Becomes stronger magnet
3 No effect
4 None of these
Explanation:
A We know that, $M=C \times \frac{B}{T}$ $M \propto \frac{1}{T}$ Where, $\mathrm{T}=$ Curie's temperature If increase the temperature of any magnetic material loose the magnetic property.
BITSAT-2005
Magnetism and Matter
154446
Above Curie temperature
1 a ferromagnetic substance becomes paramagnetic
2 a paramagnetic susbtance becomes diamagnetic
3 a diamagnetic substance becomes paramagnetic
4 a paramagnetic substance becomes ferromagnetic
Explanation:
A Ferromagnetic materials are those materials that are strongly attracted by an external magnetic field. When these materials are placed in an external magnetic field, they get strongly magnetised in the direction of the magnetic field. The magnetising effect remains even after removing the external magnetic field. However, when ferromagnetic materials are heated, they lose their properties and are converted into paramagnetic materials above a certain temperature. This temperature is called Curie temperature. Therefore, Curie temperature is the temperature above which ferromagnetic material becomes paramagnetic material.
CBSE AIPMT- 2006
Magnetism and Matter
154463
The magnetic susceptibility of the material of a rod is 499. Permeability of vacuum is $4 \pi \times 10^{-7}$ $\mathrm{Hm}^{-1}$. Absolute permeability of the material of the $\operatorname{rod}$ in $\mathrm{H} / \mathrm{m}$ is
154464
The speed of electrons in a cathode ray beam, which remains undeflected, in Thomson experiment, under the simultaneously action of a magnetic field $2 \times 10^{-3} \mathrm{Wbm}^{-2}$ and that of an electric field $3.4 \times 10^{4} \mathrm{Vm}^{-1}$ is
1 $1.7 \times 10^{7} \mathrm{~ms}^{-1}$
2 $2.8 \times 10^{7} \mathrm{~ms}^{-1}$
3 $1.2 \times 10^{6} \mathrm{~ms}^{-1}$
4 $54 \times 10^{6} \mathrm{~ms}^{-1}$
Explanation:
A Given, magnetic field (B) $=2 \times 10^{-3} \mathrm{Wbm}^{-2}$ Electric field $(\mathrm{E})=3.4 \times 10^{4} \mathrm{Vm}^{-1}$ In the Thomson experiment, expression for speed of beam of electron is given as, We know that, speed of electron- $\frac{\mathrm{E}}{\mathrm{B}}=\frac{3.4 \times 10^{4}}{2 \times 10^{-3}}=1.7 \times 10^{7} \mathrm{~ms}^{-1}$
AP EAMCET-1993
Magnetism and Matter
154473
Substance which when placed in a magnetic field, acquire feeble magnetization in a direction opposite to that of the applied field are called
1 diamagnetic substances
2 paramagnetic substances
3 ferromagnetic substances
4 ferrimagnetic substances
Explanation:
A Diamagnetic substance are substances that acquire feeble magnetism when placed in a magnetic field and the direction of the induced magnetic field is opposite to that of the applied magnetic field. Ex. bismuth, copper, silver, gold, mercury etc. Thus when a bar of diamagnetic material is placed in external magnetic field, the field lines are repelled or expelled and line inside the material is reduced.
NEET Test Series from KOTA - 10 Papers In MS WORD
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Magnetism and Matter
154471
What happens, when a magnetic substance is heated?
1 Loses magnetism
2 Becomes stronger magnet
3 No effect
4 None of these
Explanation:
A We know that, $M=C \times \frac{B}{T}$ $M \propto \frac{1}{T}$ Where, $\mathrm{T}=$ Curie's temperature If increase the temperature of any magnetic material loose the magnetic property.
BITSAT-2005
Magnetism and Matter
154446
Above Curie temperature
1 a ferromagnetic substance becomes paramagnetic
2 a paramagnetic susbtance becomes diamagnetic
3 a diamagnetic substance becomes paramagnetic
4 a paramagnetic substance becomes ferromagnetic
Explanation:
A Ferromagnetic materials are those materials that are strongly attracted by an external magnetic field. When these materials are placed in an external magnetic field, they get strongly magnetised in the direction of the magnetic field. The magnetising effect remains even after removing the external magnetic field. However, when ferromagnetic materials are heated, they lose their properties and are converted into paramagnetic materials above a certain temperature. This temperature is called Curie temperature. Therefore, Curie temperature is the temperature above which ferromagnetic material becomes paramagnetic material.
CBSE AIPMT- 2006
Magnetism and Matter
154463
The magnetic susceptibility of the material of a rod is 499. Permeability of vacuum is $4 \pi \times 10^{-7}$ $\mathrm{Hm}^{-1}$. Absolute permeability of the material of the $\operatorname{rod}$ in $\mathrm{H} / \mathrm{m}$ is
154464
The speed of electrons in a cathode ray beam, which remains undeflected, in Thomson experiment, under the simultaneously action of a magnetic field $2 \times 10^{-3} \mathrm{Wbm}^{-2}$ and that of an electric field $3.4 \times 10^{4} \mathrm{Vm}^{-1}$ is
1 $1.7 \times 10^{7} \mathrm{~ms}^{-1}$
2 $2.8 \times 10^{7} \mathrm{~ms}^{-1}$
3 $1.2 \times 10^{6} \mathrm{~ms}^{-1}$
4 $54 \times 10^{6} \mathrm{~ms}^{-1}$
Explanation:
A Given, magnetic field (B) $=2 \times 10^{-3} \mathrm{Wbm}^{-2}$ Electric field $(\mathrm{E})=3.4 \times 10^{4} \mathrm{Vm}^{-1}$ In the Thomson experiment, expression for speed of beam of electron is given as, We know that, speed of electron- $\frac{\mathrm{E}}{\mathrm{B}}=\frac{3.4 \times 10^{4}}{2 \times 10^{-3}}=1.7 \times 10^{7} \mathrm{~ms}^{-1}$
AP EAMCET-1993
Magnetism and Matter
154473
Substance which when placed in a magnetic field, acquire feeble magnetization in a direction opposite to that of the applied field are called
1 diamagnetic substances
2 paramagnetic substances
3 ferromagnetic substances
4 ferrimagnetic substances
Explanation:
A Diamagnetic substance are substances that acquire feeble magnetism when placed in a magnetic field and the direction of the induced magnetic field is opposite to that of the applied magnetic field. Ex. bismuth, copper, silver, gold, mercury etc. Thus when a bar of diamagnetic material is placed in external magnetic field, the field lines are repelled or expelled and line inside the material is reduced.
154471
What happens, when a magnetic substance is heated?
1 Loses magnetism
2 Becomes stronger magnet
3 No effect
4 None of these
Explanation:
A We know that, $M=C \times \frac{B}{T}$ $M \propto \frac{1}{T}$ Where, $\mathrm{T}=$ Curie's temperature If increase the temperature of any magnetic material loose the magnetic property.
BITSAT-2005
Magnetism and Matter
154446
Above Curie temperature
1 a ferromagnetic substance becomes paramagnetic
2 a paramagnetic susbtance becomes diamagnetic
3 a diamagnetic substance becomes paramagnetic
4 a paramagnetic substance becomes ferromagnetic
Explanation:
A Ferromagnetic materials are those materials that are strongly attracted by an external magnetic field. When these materials are placed in an external magnetic field, they get strongly magnetised in the direction of the magnetic field. The magnetising effect remains even after removing the external magnetic field. However, when ferromagnetic materials are heated, they lose their properties and are converted into paramagnetic materials above a certain temperature. This temperature is called Curie temperature. Therefore, Curie temperature is the temperature above which ferromagnetic material becomes paramagnetic material.
CBSE AIPMT- 2006
Magnetism and Matter
154463
The magnetic susceptibility of the material of a rod is 499. Permeability of vacuum is $4 \pi \times 10^{-7}$ $\mathrm{Hm}^{-1}$. Absolute permeability of the material of the $\operatorname{rod}$ in $\mathrm{H} / \mathrm{m}$ is
154464
The speed of electrons in a cathode ray beam, which remains undeflected, in Thomson experiment, under the simultaneously action of a magnetic field $2 \times 10^{-3} \mathrm{Wbm}^{-2}$ and that of an electric field $3.4 \times 10^{4} \mathrm{Vm}^{-1}$ is
1 $1.7 \times 10^{7} \mathrm{~ms}^{-1}$
2 $2.8 \times 10^{7} \mathrm{~ms}^{-1}$
3 $1.2 \times 10^{6} \mathrm{~ms}^{-1}$
4 $54 \times 10^{6} \mathrm{~ms}^{-1}$
Explanation:
A Given, magnetic field (B) $=2 \times 10^{-3} \mathrm{Wbm}^{-2}$ Electric field $(\mathrm{E})=3.4 \times 10^{4} \mathrm{Vm}^{-1}$ In the Thomson experiment, expression for speed of beam of electron is given as, We know that, speed of electron- $\frac{\mathrm{E}}{\mathrm{B}}=\frac{3.4 \times 10^{4}}{2 \times 10^{-3}}=1.7 \times 10^{7} \mathrm{~ms}^{-1}$
AP EAMCET-1993
Magnetism and Matter
154473
Substance which when placed in a magnetic field, acquire feeble magnetization in a direction opposite to that of the applied field are called
1 diamagnetic substances
2 paramagnetic substances
3 ferromagnetic substances
4 ferrimagnetic substances
Explanation:
A Diamagnetic substance are substances that acquire feeble magnetism when placed in a magnetic field and the direction of the induced magnetic field is opposite to that of the applied magnetic field. Ex. bismuth, copper, silver, gold, mercury etc. Thus when a bar of diamagnetic material is placed in external magnetic field, the field lines are repelled or expelled and line inside the material is reduced.
154471
What happens, when a magnetic substance is heated?
1 Loses magnetism
2 Becomes stronger magnet
3 No effect
4 None of these
Explanation:
A We know that, $M=C \times \frac{B}{T}$ $M \propto \frac{1}{T}$ Where, $\mathrm{T}=$ Curie's temperature If increase the temperature of any magnetic material loose the magnetic property.
BITSAT-2005
Magnetism and Matter
154446
Above Curie temperature
1 a ferromagnetic substance becomes paramagnetic
2 a paramagnetic susbtance becomes diamagnetic
3 a diamagnetic substance becomes paramagnetic
4 a paramagnetic substance becomes ferromagnetic
Explanation:
A Ferromagnetic materials are those materials that are strongly attracted by an external magnetic field. When these materials are placed in an external magnetic field, they get strongly magnetised in the direction of the magnetic field. The magnetising effect remains even after removing the external magnetic field. However, when ferromagnetic materials are heated, they lose their properties and are converted into paramagnetic materials above a certain temperature. This temperature is called Curie temperature. Therefore, Curie temperature is the temperature above which ferromagnetic material becomes paramagnetic material.
CBSE AIPMT- 2006
Magnetism and Matter
154463
The magnetic susceptibility of the material of a rod is 499. Permeability of vacuum is $4 \pi \times 10^{-7}$ $\mathrm{Hm}^{-1}$. Absolute permeability of the material of the $\operatorname{rod}$ in $\mathrm{H} / \mathrm{m}$ is
154464
The speed of electrons in a cathode ray beam, which remains undeflected, in Thomson experiment, under the simultaneously action of a magnetic field $2 \times 10^{-3} \mathrm{Wbm}^{-2}$ and that of an electric field $3.4 \times 10^{4} \mathrm{Vm}^{-1}$ is
1 $1.7 \times 10^{7} \mathrm{~ms}^{-1}$
2 $2.8 \times 10^{7} \mathrm{~ms}^{-1}$
3 $1.2 \times 10^{6} \mathrm{~ms}^{-1}$
4 $54 \times 10^{6} \mathrm{~ms}^{-1}$
Explanation:
A Given, magnetic field (B) $=2 \times 10^{-3} \mathrm{Wbm}^{-2}$ Electric field $(\mathrm{E})=3.4 \times 10^{4} \mathrm{Vm}^{-1}$ In the Thomson experiment, expression for speed of beam of electron is given as, We know that, speed of electron- $\frac{\mathrm{E}}{\mathrm{B}}=\frac{3.4 \times 10^{4}}{2 \times 10^{-3}}=1.7 \times 10^{7} \mathrm{~ms}^{-1}$
AP EAMCET-1993
Magnetism and Matter
154473
Substance which when placed in a magnetic field, acquire feeble magnetization in a direction opposite to that of the applied field are called
1 diamagnetic substances
2 paramagnetic substances
3 ferromagnetic substances
4 ferrimagnetic substances
Explanation:
A Diamagnetic substance are substances that acquire feeble magnetism when placed in a magnetic field and the direction of the induced magnetic field is opposite to that of the applied magnetic field. Ex. bismuth, copper, silver, gold, mercury etc. Thus when a bar of diamagnetic material is placed in external magnetic field, the field lines are repelled or expelled and line inside the material is reduced.