Heat Transfer
PHXI11:THERMAL PROPERTIES OF MATTER

366432 The thermal conductivity of brick is \(1.7\;W\;{m^{ - 1}}\;{K^{ - 1}}\), and that of cement is \(2.9\;W\;{m^{ - 1}}\;{K^{ - 1}}\). What thickness of cement will have same insulation as the brick of thickness \(20\;cm\).

1 \(34.12\;cm\)
2 \(26.18\;cm\)
3 \(14.18\;cm\)
4 \(29.3\;cm\)
PHXI11:THERMAL PROPERTIES OF MATTER

366433 If the temperature difference on the two sides of a wall increase from \(100^\circ C\) to \(200^\circ C,\) its thermal conductivity

1 Is doubled
2 Remains unchanged
3 Becomes four times
4 Is halved
PHXI11:THERMAL PROPERTIES OF MATTER

366434 For cooking the food, which of the following type of utensil is most suitable

1 High specific heat and high conductivity
2 High specific heat and low conductivity
3 Low specific heat and high conductivity
4 Low specific heat and low conductivity
PHXI11:THERMAL PROPERTIES OF MATTER

366435 One end of a copper rod of uniform cross-section and of length 3.1 \(m\) is kept in contact with ice and the other end with water at \(100^{\circ} {C}\). Find the distance of a point from \(100^{\circ} {C}\) end, along its length should a temperature of \(200^{\circ} {C}\) be maintained so that in steady state, the mass of ice melting be equal to that of the steam produced in the same interval of time. Assume that the whole system is insulated from the surroundings. Latent heat of fusion of ice and vaporization of water are \(80\,\, {cal} / {g}\) and \(540\,\, {cal} / {g}\) respectively.
supporting img

1 \(40\,cm\)
2 \(65\,cm\)
3 \(20\,cm\)
4 \(10\,cm\)
PHXI11:THERMAL PROPERTIES OF MATTER

366432 The thermal conductivity of brick is \(1.7\;W\;{m^{ - 1}}\;{K^{ - 1}}\), and that of cement is \(2.9\;W\;{m^{ - 1}}\;{K^{ - 1}}\). What thickness of cement will have same insulation as the brick of thickness \(20\;cm\).

1 \(34.12\;cm\)
2 \(26.18\;cm\)
3 \(14.18\;cm\)
4 \(29.3\;cm\)
PHXI11:THERMAL PROPERTIES OF MATTER

366433 If the temperature difference on the two sides of a wall increase from \(100^\circ C\) to \(200^\circ C,\) its thermal conductivity

1 Is doubled
2 Remains unchanged
3 Becomes four times
4 Is halved
PHXI11:THERMAL PROPERTIES OF MATTER

366434 For cooking the food, which of the following type of utensil is most suitable

1 High specific heat and high conductivity
2 High specific heat and low conductivity
3 Low specific heat and high conductivity
4 Low specific heat and low conductivity
PHXI11:THERMAL PROPERTIES OF MATTER

366435 One end of a copper rod of uniform cross-section and of length 3.1 \(m\) is kept in contact with ice and the other end with water at \(100^{\circ} {C}\). Find the distance of a point from \(100^{\circ} {C}\) end, along its length should a temperature of \(200^{\circ} {C}\) be maintained so that in steady state, the mass of ice melting be equal to that of the steam produced in the same interval of time. Assume that the whole system is insulated from the surroundings. Latent heat of fusion of ice and vaporization of water are \(80\,\, {cal} / {g}\) and \(540\,\, {cal} / {g}\) respectively.
supporting img

1 \(40\,cm\)
2 \(65\,cm\)
3 \(20\,cm\)
4 \(10\,cm\)
PHXI11:THERMAL PROPERTIES OF MATTER

366432 The thermal conductivity of brick is \(1.7\;W\;{m^{ - 1}}\;{K^{ - 1}}\), and that of cement is \(2.9\;W\;{m^{ - 1}}\;{K^{ - 1}}\). What thickness of cement will have same insulation as the brick of thickness \(20\;cm\).

1 \(34.12\;cm\)
2 \(26.18\;cm\)
3 \(14.18\;cm\)
4 \(29.3\;cm\)
PHXI11:THERMAL PROPERTIES OF MATTER

366433 If the temperature difference on the two sides of a wall increase from \(100^\circ C\) to \(200^\circ C,\) its thermal conductivity

1 Is doubled
2 Remains unchanged
3 Becomes four times
4 Is halved
PHXI11:THERMAL PROPERTIES OF MATTER

366434 For cooking the food, which of the following type of utensil is most suitable

1 High specific heat and high conductivity
2 High specific heat and low conductivity
3 Low specific heat and high conductivity
4 Low specific heat and low conductivity
PHXI11:THERMAL PROPERTIES OF MATTER

366435 One end of a copper rod of uniform cross-section and of length 3.1 \(m\) is kept in contact with ice and the other end with water at \(100^{\circ} {C}\). Find the distance of a point from \(100^{\circ} {C}\) end, along its length should a temperature of \(200^{\circ} {C}\) be maintained so that in steady state, the mass of ice melting be equal to that of the steam produced in the same interval of time. Assume that the whole system is insulated from the surroundings. Latent heat of fusion of ice and vaporization of water are \(80\,\, {cal} / {g}\) and \(540\,\, {cal} / {g}\) respectively.
supporting img

1 \(40\,cm\)
2 \(65\,cm\)
3 \(20\,cm\)
4 \(10\,cm\)
PHXI11:THERMAL PROPERTIES OF MATTER

366432 The thermal conductivity of brick is \(1.7\;W\;{m^{ - 1}}\;{K^{ - 1}}\), and that of cement is \(2.9\;W\;{m^{ - 1}}\;{K^{ - 1}}\). What thickness of cement will have same insulation as the brick of thickness \(20\;cm\).

1 \(34.12\;cm\)
2 \(26.18\;cm\)
3 \(14.18\;cm\)
4 \(29.3\;cm\)
PHXI11:THERMAL PROPERTIES OF MATTER

366433 If the temperature difference on the two sides of a wall increase from \(100^\circ C\) to \(200^\circ C,\) its thermal conductivity

1 Is doubled
2 Remains unchanged
3 Becomes four times
4 Is halved
PHXI11:THERMAL PROPERTIES OF MATTER

366434 For cooking the food, which of the following type of utensil is most suitable

1 High specific heat and high conductivity
2 High specific heat and low conductivity
3 Low specific heat and high conductivity
4 Low specific heat and low conductivity
PHXI11:THERMAL PROPERTIES OF MATTER

366435 One end of a copper rod of uniform cross-section and of length 3.1 \(m\) is kept in contact with ice and the other end with water at \(100^{\circ} {C}\). Find the distance of a point from \(100^{\circ} {C}\) end, along its length should a temperature of \(200^{\circ} {C}\) be maintained so that in steady state, the mass of ice melting be equal to that of the steam produced in the same interval of time. Assume that the whole system is insulated from the surroundings. Latent heat of fusion of ice and vaporization of water are \(80\,\, {cal} / {g}\) and \(540\,\, {cal} / {g}\) respectively.
supporting img

1 \(40\,cm\)
2 \(65\,cm\)
3 \(20\,cm\)
4 \(10\,cm\)