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Q. No.The SI unit of thermal capacity per unit volume is:
1.
joule/m3
2.
joule/kelvin
3.
joule/kg-m3
4.
joule/kelvin-m3
Subtopic: Calorimetry |
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The coefficient of linear expansion of the material of a wire \(A\) is \(\alpha,\) and that of the material of a wire \(B\) is \(2\alpha.\) The two wires are joined end-to-end. If the average coefficient of linear expansion of the composite wire is \(1.5\alpha,\) the lengths of the wires \(A,B\) are in the ratio:
1. \(1:1\)
2. \(2:1\)
3. \(1:2\)
4. \(3:1\)
1. \(1:1\)
2. \(2:1\)
3. \(1:2\)
4. \(3:1\)
Subtopic: Thermal Expansion |
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The volume of a fixed mass of an ideal gas (at constant pressure) is plotted as a function of temperature, measured on a certain scale (see figure). Further, \(\theta\) (temperature) \(=0\) corresponds to the melting point of ice under standard atmospheric pressure.
The volume of an ideal gas increases, at fixed pressure, by a fraction \(\delta'\) of its volume at \(\theta=0\) for every unit increase in temperature \((\theta).\) \(\delta'\) equals:
The volume of an ideal gas increases, at fixed pressure, by a fraction \(\delta'\) of its volume at \(\theta=0\) for every unit increase in temperature \((\theta).\) \(\delta'\) equals:
| 1. | \(0.004\) | 2. | \(0.002\) |
| 3. | \(0.001\) | 4. | \(0.0005\) |
Subtopic: Temperature and Heat |
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The volume of a fixed mass of an ideal gas (at constant pressure) is plotted as a function of temperature, measured on a certain scale (see figure). Further, \(\theta\) (temperature) \(=0\) corresponds to the melting point of ice under standard atmospheric pressure.
The value of absolute zero, in this new scale, is:
The value of absolute zero, in this new scale, is:
| 1. | \(\theta=-100\) | 2. | \(\theta=-200\) |
| 3. | \(\theta=-500\) | 4. | \(\theta=-1000\) |
Subtopic: Temperature and Heat |
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The volume of a fixed mass of an ideal gas (at constant pressure) is plotted as a function of temperature, measured on a certain scale (see figure). Further, \(\theta\) (temperature) \(=0\) corresponds to the melting point of ice under standard atmospheric pressure.
The value \(\theta=100\) corresponds to a temperature, on the Celsius scale,
1. \(100^\circ\text C\)
2. \(273^\circ\text C\)
3. \(546^\circ\text C\)
4. \(54.6^\circ\text C\)
The value \(\theta=100\) corresponds to a temperature, on the Celsius scale,
1. \(100^\circ\text C\)
2. \(273^\circ\text C\)
3. \(546^\circ\text C\)
4. \(54.6^\circ\text C\)
Subtopic: Temperature and Heat |
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The specific heat capacity of a solid \(A\) is identical to that of another solid \(B\) at \(0^\circ\text C.\) The specific heat capacity of the solid \(A\) increases linearly by \(10\%\) from \(0^\circ\text C\) to \(100^\circ\text C;\) while that of solid \(B\) remains constant. If \(Q_A\) amount of heat is required to raise the temperature of solid \(A\) from \(0^\circ\text C\) to \(100^\circ\text C\) and \(Q_B\) be the heat required to raise the same mass of solid \(B\) from \(0^\circ\text C\) to \(100^\circ\text C,\) then,
| 1. | \(Q_A=1.1Q_B\) |
| 2. | \(Q_A>1.1Q_B\) |
| 3. | \(Q_A<1.1Q_B~\text{but}~Q_A>Q_B\) |
| 4. | \(Q_A=Q_B \) |
Subtopic: Calorimetry |
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A solid \(A\) has a lower coefficient of thermal expansion than a liquid \(B.\) A sphere made of \(A\) floats in liquid \(B\text:\) fully submerged, but does not sink, at a fixed temperature. If the temperature of the system is raised, the sphere will:
| 1. | move slightly upward, but remain submerged |
| 2. | move slightly down, but remain submerged |
| 3. | rise up to the surface |
| 4. | sink within the liquid |
Subtopic: Thermal Expansion |
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If the coefficient of linear expansion of a metal is \(10^{-5}/^\circ\text C,\) the coefficient of volume expansion of the same metal is:
1. \(10^{-5}/^\circ\text C\)
2. \(2\times10^{-5}/^\circ\text C\)
3. \(4\times10^{-5}/^\circ\text C\)
4. \(3\times10^{-5}/^\circ\text C\)
1. \(10^{-5}/^\circ\text C\)
2. \(2\times10^{-5}/^\circ\text C\)
3. \(4\times10^{-5}/^\circ\text C\)
4. \(3\times10^{-5}/^\circ\text C\)
Subtopic: Thermal Expansion |
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If the volume of a solid sphere increases by \(1\%\) when its temperature is raised from \(0^\circ\text C\) to \(100^\circ\text C,\) then the volume of a hollow sphere of the same material, when the temperature is raised similarly,
1. increases by \(1\%\)
2. increases between \(0\) to \(1\%\)
3. increases by more than \(1\%\)
4. decreases
1. increases by \(1\%\)
2. increases between \(0\) to \(1\%\)
3. increases by more than \(1\%\)
4. decreases
Subtopic: Thermal Expansion |
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A cavity is made within a solid, shaped in the form of a cube. The cavity is also cubical and centred within the solid. The temperature of the solid is raised. The volume of the cavity:
| 1. | increases by the same fraction as the cube |
| 2. | increases by a lower fraction than the cube |
| 3. | decreases |
| 4. | remains the same |
Subtopic: Thermal Expansion |
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