00. Conduction
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NEET DIGITAL LIBRARY
Heat Transfer

149343 The end $A$ of a rod $A B$ of length $1 \mathrm{~m}$ is maintained at $100^{\circ}$ and the end $B$ at $10^{\circ} \mathrm{C}$. The temperature at a distance of $60 \mathrm{~cm}$ from the end $B$ is

1 $64^{\circ} \mathrm{C}$
2 $36^{\circ} \mathrm{C}$
3 $46^{\circ} \mathrm{C}$
4 $72^{\circ} \mathrm{C}$
CG PET- 2008
Heat Transfer

149344 Two identical vessels made up of same material are filled with same amount of ice. If in the vessels the ice melts in time $t_{1}$ and $t_{2}$ respectively, then the ratio of their thermal conductivities will be

1 $t_{2}: t_{1}$
2 $t_{1}: t_{2}$
3 $\mathrm{t}_{2}^{2}: \mathrm{t}_{1}^{2}$
4 $t_{1}^{2}: t_{2}^{2}$
CG PET- 2007
Heat Transfer

149345 A cylinder of radius $R$ and made of a material of thermal conductivity $K_{1}$ is surrounded by a cylindrical shell of inner radius $R$ and outer radius $2 R$ made of a material of thermal conductivity $K_{2}$. The two ends of the combined system are maintained at two different temperature. There is no loss of heat across the cylindrical surface and the system is in steady state. The effective thermal conductivity of the system is

1 $\mathrm{K}_{1}+\mathrm{K}_{2}$
2 $\frac{\mathrm{K}_{1} \mathrm{~K}_{2}}{\mathrm{~K}_{1}+\mathrm{K}_{2}}$
3 $\frac{\mathrm{K}_{1}+3 \mathrm{~K}_{2}}{4}$
4 $\frac{3 \mathrm{~K}_{1}+\mathrm{K}_{2}}{4}$
AMU-2016
Heat Transfer

149346 Two rods (one semi-circular and other straight) of same material and of same cross-sectional area are joined as shown in the figure. The points $A$ and $B$ are maintained at different temperature. The ratio of the heat transferred through a cross-section of the straight rod in a given time is

1 $2: \pi$
2 $1: 2$
3 $\pi: 2$
4 $3: 2$
Manipal UGET-2014
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Heat Transfer

149343 The end $A$ of a rod $A B$ of length $1 \mathrm{~m}$ is maintained at $100^{\circ}$ and the end $B$ at $10^{\circ} \mathrm{C}$. The temperature at a distance of $60 \mathrm{~cm}$ from the end $B$ is

1 $64^{\circ} \mathrm{C}$
2 $36^{\circ} \mathrm{C}$
3 $46^{\circ} \mathrm{C}$
4 $72^{\circ} \mathrm{C}$
CG PET- 2008
Heat Transfer

149344 Two identical vessels made up of same material are filled with same amount of ice. If in the vessels the ice melts in time $t_{1}$ and $t_{2}$ respectively, then the ratio of their thermal conductivities will be

1 $t_{2}: t_{1}$
2 $t_{1}: t_{2}$
3 $\mathrm{t}_{2}^{2}: \mathrm{t}_{1}^{2}$
4 $t_{1}^{2}: t_{2}^{2}$
CG PET- 2007
Heat Transfer

149345 A cylinder of radius $R$ and made of a material of thermal conductivity $K_{1}$ is surrounded by a cylindrical shell of inner radius $R$ and outer radius $2 R$ made of a material of thermal conductivity $K_{2}$. The two ends of the combined system are maintained at two different temperature. There is no loss of heat across the cylindrical surface and the system is in steady state. The effective thermal conductivity of the system is

1 $\mathrm{K}_{1}+\mathrm{K}_{2}$
2 $\frac{\mathrm{K}_{1} \mathrm{~K}_{2}}{\mathrm{~K}_{1}+\mathrm{K}_{2}}$
3 $\frac{\mathrm{K}_{1}+3 \mathrm{~K}_{2}}{4}$
4 $\frac{3 \mathrm{~K}_{1}+\mathrm{K}_{2}}{4}$
AMU-2016
Heat Transfer

149346 Two rods (one semi-circular and other straight) of same material and of same cross-sectional area are joined as shown in the figure. The points $A$ and $B$ are maintained at different temperature. The ratio of the heat transferred through a cross-section of the straight rod in a given time is

1 $2: \pi$
2 $1: 2$
3 $\pi: 2$
4 $3: 2$
Manipal UGET-2014
For More Updates join with Us
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
Heat Transfer

149343 The end $A$ of a rod $A B$ of length $1 \mathrm{~m}$ is maintained at $100^{\circ}$ and the end $B$ at $10^{\circ} \mathrm{C}$. The temperature at a distance of $60 \mathrm{~cm}$ from the end $B$ is

1 $64^{\circ} \mathrm{C}$
2 $36^{\circ} \mathrm{C}$
3 $46^{\circ} \mathrm{C}$
4 $72^{\circ} \mathrm{C}$
CG PET- 2008
Heat Transfer

149344 Two identical vessels made up of same material are filled with same amount of ice. If in the vessels the ice melts in time $t_{1}$ and $t_{2}$ respectively, then the ratio of their thermal conductivities will be

1 $t_{2}: t_{1}$
2 $t_{1}: t_{2}$
3 $\mathrm{t}_{2}^{2}: \mathrm{t}_{1}^{2}$
4 $t_{1}^{2}: t_{2}^{2}$
CG PET- 2007
Heat Transfer

149345 A cylinder of radius $R$ and made of a material of thermal conductivity $K_{1}$ is surrounded by a cylindrical shell of inner radius $R$ and outer radius $2 R$ made of a material of thermal conductivity $K_{2}$. The two ends of the combined system are maintained at two different temperature. There is no loss of heat across the cylindrical surface and the system is in steady state. The effective thermal conductivity of the system is

1 $\mathrm{K}_{1}+\mathrm{K}_{2}$
2 $\frac{\mathrm{K}_{1} \mathrm{~K}_{2}}{\mathrm{~K}_{1}+\mathrm{K}_{2}}$
3 $\frac{\mathrm{K}_{1}+3 \mathrm{~K}_{2}}{4}$
4 $\frac{3 \mathrm{~K}_{1}+\mathrm{K}_{2}}{4}$
AMU-2016
Heat Transfer

149346 Two rods (one semi-circular and other straight) of same material and of same cross-sectional area are joined as shown in the figure. The points $A$ and $B$ are maintained at different temperature. The ratio of the heat transferred through a cross-section of the straight rod in a given time is

1 $2: \pi$
2 $1: 2$
3 $\pi: 2$
4 $3: 2$
Manipal UGET-2014
NEET DIGITAL LIBRARY
Heat Transfer

149343 The end $A$ of a rod $A B$ of length $1 \mathrm{~m}$ is maintained at $100^{\circ}$ and the end $B$ at $10^{\circ} \mathrm{C}$. The temperature at a distance of $60 \mathrm{~cm}$ from the end $B$ is

1 $64^{\circ} \mathrm{C}$
2 $36^{\circ} \mathrm{C}$
3 $46^{\circ} \mathrm{C}$
4 $72^{\circ} \mathrm{C}$
CG PET- 2008
Heat Transfer

149344 Two identical vessels made up of same material are filled with same amount of ice. If in the vessels the ice melts in time $t_{1}$ and $t_{2}$ respectively, then the ratio of their thermal conductivities will be

1 $t_{2}: t_{1}$
2 $t_{1}: t_{2}$
3 $\mathrm{t}_{2}^{2}: \mathrm{t}_{1}^{2}$
4 $t_{1}^{2}: t_{2}^{2}$
CG PET- 2007
Heat Transfer

149345 A cylinder of radius $R$ and made of a material of thermal conductivity $K_{1}$ is surrounded by a cylindrical shell of inner radius $R$ and outer radius $2 R$ made of a material of thermal conductivity $K_{2}$. The two ends of the combined system are maintained at two different temperature. There is no loss of heat across the cylindrical surface and the system is in steady state. The effective thermal conductivity of the system is

1 $\mathrm{K}_{1}+\mathrm{K}_{2}$
2 $\frac{\mathrm{K}_{1} \mathrm{~K}_{2}}{\mathrm{~K}_{1}+\mathrm{K}_{2}}$
3 $\frac{\mathrm{K}_{1}+3 \mathrm{~K}_{2}}{4}$
4 $\frac{3 \mathrm{~K}_{1}+\mathrm{K}_{2}}{4}$
AMU-2016
Heat Transfer

149346 Two rods (one semi-circular and other straight) of same material and of same cross-sectional area are joined as shown in the figure. The points $A$ and $B$ are maintained at different temperature. The ratio of the heat transferred through a cross-section of the straight rod in a given time is

1 $2: \pi$
2 $1: 2$
3 $\pi: 2$
4 $3: 2$
Manipal UGET-2014
Join With Us for More Updates