01. Thermal Expansion (Linear, Area and Volume Expansion)
Thermal Properties of Matter

146621 Thomson coefficient of a conductor is $10 \mu \mathrm{VK}$. The two ends of it are kept at $50^{\circ} \mathrm{C}$ and $60^{\circ} \mathrm{C}$ respectively. Amount of heat absorbed by the conductor when a charge of $10 \mathrm{C}$ flows through it, is

1 $1000 \mathrm{~J}$
2 $100 \mathrm{~J}$
3 $100 \mathrm{~mJ}$
4 $1 \mathrm{~mJ}$
Thermal Properties of Matter

146622 A metal sphere of radius $r$ and specific heat $s$ is rotated about an axis passing through its centre at a speed of a rotation/s. It is suddenly stopped and $50 \%$ of its energy is used increasing its temperature. Then, the rise in temperature of the sphere is

1 $\frac{2 \pi^{2} n^{2} r^{2}}{5 s}$
2 $\frac{1 \pi^{2} n^{2}}{10 r^{2} s}$
3 $\frac{7}{8} \pi r^{2} n^{2} s$
4 $\frac{5(\pi \mathrm{rn})^{2}}{14 \mathrm{~s}}$
Thermal Properties of Matter

146623 The temperature of a thin uniform circular disc, of $1 \mathrm{~m}$ diameter is increased by $10^{\circ} \mathrm{C}$. The percentage increase in moment of inertia of the disc about an axis passing through its centre and perpendicular to the circular face (linear coefficient of expansion $=11 \times 10^{-6} /{ }^{\circ} \mathrm{C}$ )

1 0.0055
2 0.011
3 0.022
4 0.044
Thermal Properties of Matter

146624 A clock which keeps correct time at $20^{\circ} \mathrm{C}$, is subjected to $40^{\circ} \mathrm{C}$. If coefficient of linear expansion of the pendulum is $12 \times 10^{-6} /{ }^{\circ} \mathrm{C}$. How much will it gain or lose time?

1 $10.3 \mathrm{~s} /$ day
2 $20.6 \mathrm{~s} /$ day
3 $5 \mathrm{~s} /$ day
4 $20 \mathrm{~min} /$ day
Thermal Properties of Matter

146621 Thomson coefficient of a conductor is $10 \mu \mathrm{VK}$. The two ends of it are kept at $50^{\circ} \mathrm{C}$ and $60^{\circ} \mathrm{C}$ respectively. Amount of heat absorbed by the conductor when a charge of $10 \mathrm{C}$ flows through it, is

1 $1000 \mathrm{~J}$
2 $100 \mathrm{~J}$
3 $100 \mathrm{~mJ}$
4 $1 \mathrm{~mJ}$
Thermal Properties of Matter

146622 A metal sphere of radius $r$ and specific heat $s$ is rotated about an axis passing through its centre at a speed of a rotation/s. It is suddenly stopped and $50 \%$ of its energy is used increasing its temperature. Then, the rise in temperature of the sphere is

1 $\frac{2 \pi^{2} n^{2} r^{2}}{5 s}$
2 $\frac{1 \pi^{2} n^{2}}{10 r^{2} s}$
3 $\frac{7}{8} \pi r^{2} n^{2} s$
4 $\frac{5(\pi \mathrm{rn})^{2}}{14 \mathrm{~s}}$
Thermal Properties of Matter

146623 The temperature of a thin uniform circular disc, of $1 \mathrm{~m}$ diameter is increased by $10^{\circ} \mathrm{C}$. The percentage increase in moment of inertia of the disc about an axis passing through its centre and perpendicular to the circular face (linear coefficient of expansion $=11 \times 10^{-6} /{ }^{\circ} \mathrm{C}$ )

1 0.0055
2 0.011
3 0.022
4 0.044
Thermal Properties of Matter

146624 A clock which keeps correct time at $20^{\circ} \mathrm{C}$, is subjected to $40^{\circ} \mathrm{C}$. If coefficient of linear expansion of the pendulum is $12 \times 10^{-6} /{ }^{\circ} \mathrm{C}$. How much will it gain or lose time?

1 $10.3 \mathrm{~s} /$ day
2 $20.6 \mathrm{~s} /$ day
3 $5 \mathrm{~s} /$ day
4 $20 \mathrm{~min} /$ day
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Thermal Properties of Matter

146621 Thomson coefficient of a conductor is $10 \mu \mathrm{VK}$. The two ends of it are kept at $50^{\circ} \mathrm{C}$ and $60^{\circ} \mathrm{C}$ respectively. Amount of heat absorbed by the conductor when a charge of $10 \mathrm{C}$ flows through it, is

1 $1000 \mathrm{~J}$
2 $100 \mathrm{~J}$
3 $100 \mathrm{~mJ}$
4 $1 \mathrm{~mJ}$
Thermal Properties of Matter

146622 A metal sphere of radius $r$ and specific heat $s$ is rotated about an axis passing through its centre at a speed of a rotation/s. It is suddenly stopped and $50 \%$ of its energy is used increasing its temperature. Then, the rise in temperature of the sphere is

1 $\frac{2 \pi^{2} n^{2} r^{2}}{5 s}$
2 $\frac{1 \pi^{2} n^{2}}{10 r^{2} s}$
3 $\frac{7}{8} \pi r^{2} n^{2} s$
4 $\frac{5(\pi \mathrm{rn})^{2}}{14 \mathrm{~s}}$
Thermal Properties of Matter

146623 The temperature of a thin uniform circular disc, of $1 \mathrm{~m}$ diameter is increased by $10^{\circ} \mathrm{C}$. The percentage increase in moment of inertia of the disc about an axis passing through its centre and perpendicular to the circular face (linear coefficient of expansion $=11 \times 10^{-6} /{ }^{\circ} \mathrm{C}$ )

1 0.0055
2 0.011
3 0.022
4 0.044
Thermal Properties of Matter

146624 A clock which keeps correct time at $20^{\circ} \mathrm{C}$, is subjected to $40^{\circ} \mathrm{C}$. If coefficient of linear expansion of the pendulum is $12 \times 10^{-6} /{ }^{\circ} \mathrm{C}$. How much will it gain or lose time?

1 $10.3 \mathrm{~s} /$ day
2 $20.6 \mathrm{~s} /$ day
3 $5 \mathrm{~s} /$ day
4 $20 \mathrm{~min} /$ day
Thermal Properties of Matter

146621 Thomson coefficient of a conductor is $10 \mu \mathrm{VK}$. The two ends of it are kept at $50^{\circ} \mathrm{C}$ and $60^{\circ} \mathrm{C}$ respectively. Amount of heat absorbed by the conductor when a charge of $10 \mathrm{C}$ flows through it, is

1 $1000 \mathrm{~J}$
2 $100 \mathrm{~J}$
3 $100 \mathrm{~mJ}$
4 $1 \mathrm{~mJ}$
Thermal Properties of Matter

146622 A metal sphere of radius $r$ and specific heat $s$ is rotated about an axis passing through its centre at a speed of a rotation/s. It is suddenly stopped and $50 \%$ of its energy is used increasing its temperature. Then, the rise in temperature of the sphere is

1 $\frac{2 \pi^{2} n^{2} r^{2}}{5 s}$
2 $\frac{1 \pi^{2} n^{2}}{10 r^{2} s}$
3 $\frac{7}{8} \pi r^{2} n^{2} s$
4 $\frac{5(\pi \mathrm{rn})^{2}}{14 \mathrm{~s}}$
Thermal Properties of Matter

146623 The temperature of a thin uniform circular disc, of $1 \mathrm{~m}$ diameter is increased by $10^{\circ} \mathrm{C}$. The percentage increase in moment of inertia of the disc about an axis passing through its centre and perpendicular to the circular face (linear coefficient of expansion $=11 \times 10^{-6} /{ }^{\circ} \mathrm{C}$ )

1 0.0055
2 0.011
3 0.022
4 0.044
Thermal Properties of Matter

146624 A clock which keeps correct time at $20^{\circ} \mathrm{C}$, is subjected to $40^{\circ} \mathrm{C}$. If coefficient of linear expansion of the pendulum is $12 \times 10^{-6} /{ }^{\circ} \mathrm{C}$. How much will it gain or lose time?

1 $10.3 \mathrm{~s} /$ day
2 $20.6 \mathrm{~s} /$ day
3 $5 \mathrm{~s} /$ day
4 $20 \mathrm{~min} /$ day