149606 Read the following statements:
A. When small temperature difference between a liquid and its surrounding is doubled the rate of loss of heat of the liquid becomes twice.
B. Two bodies $\mathrm{P}$ and $\mathrm{Q}$ having equal surface areas are maintained at temperature $10^{\circ} \mathrm{C}$ and $20^{\circ} \mathrm{C}$. The thermal radiation emitted in a given time by $\mathrm{P}$ and $\mathrm{Q}$ are in the ratio $1: 1.15$
C. A Carnot engine working between $100 \mathrm{~K}$ and $400 \mathrm{~K}$ has an efficiency of $75 \%$
D. When small temperature difference between a liquid and its surrounding is quadrupled, the rate of loss of heat of the liquid becomes twice.
Choose the correct answer from the options given below:

149608 A black body radiates at two temperature $T_{1}$ and $T_{2}$ such that $T_{1} \lt T_{2}$. The frequency corresponding to maximum intensity is:

149609 Two identical metallic balls, whose temperatures are $200^{\circ} \mathrm{C}$ and $400^{\circ} \mathrm{C}$ respectively are placed in an enclosure at $27^{\circ} \mathrm{C}$. The ratio of heat-loss of the balls will be

149610 Two circular discs $A$ and $B$ with equal radii are blackened. They are heated to same temperature and are cooled under identical conditions.
What inference do you draw from their cooling curves?

149611 A body does not emit heat energy at

149606 Read the following statements:
A. When small temperature difference between a liquid and its surrounding is doubled the rate of loss of heat of the liquid becomes twice.
B. Two bodies $\mathrm{P}$ and $\mathrm{Q}$ having equal surface areas are maintained at temperature $10^{\circ} \mathrm{C}$ and $20^{\circ} \mathrm{C}$. The thermal radiation emitted in a given time by $\mathrm{P}$ and $\mathrm{Q}$ are in the ratio $1: 1.15$
C. A Carnot engine working between $100 \mathrm{~K}$ and $400 \mathrm{~K}$ has an efficiency of $75 \%$
D. When small temperature difference between a liquid and its surrounding is quadrupled, the rate of loss of heat of the liquid becomes twice.
Choose the correct answer from the options given below:

149608 A black body radiates at two temperature $T_{1}$ and $T_{2}$ such that $T_{1} \lt T_{2}$. The frequency corresponding to maximum intensity is:

149609 Two identical metallic balls, whose temperatures are $200^{\circ} \mathrm{C}$ and $400^{\circ} \mathrm{C}$ respectively are placed in an enclosure at $27^{\circ} \mathrm{C}$. The ratio of heat-loss of the balls will be

149610 Two circular discs $A$ and $B$ with equal radii are blackened. They are heated to same temperature and are cooled under identical conditions.
What inference do you draw from their cooling curves?

149611 A body does not emit heat energy at

149606 Read the following statements:
A. When small temperature difference between a liquid and its surrounding is doubled the rate of loss of heat of the liquid becomes twice.
B. Two bodies $\mathrm{P}$ and $\mathrm{Q}$ having equal surface areas are maintained at temperature $10^{\circ} \mathrm{C}$ and $20^{\circ} \mathrm{C}$. The thermal radiation emitted in a given time by $\mathrm{P}$ and $\mathrm{Q}$ are in the ratio $1: 1.15$
C. A Carnot engine working between $100 \mathrm{~K}$ and $400 \mathrm{~K}$ has an efficiency of $75 \%$
D. When small temperature difference between a liquid and its surrounding is quadrupled, the rate of loss of heat of the liquid becomes twice.
Choose the correct answer from the options given below:

149608 A black body radiates at two temperature $T_{1}$ and $T_{2}$ such that $T_{1} \lt T_{2}$. The frequency corresponding to maximum intensity is:

149609 Two identical metallic balls, whose temperatures are $200^{\circ} \mathrm{C}$ and $400^{\circ} \mathrm{C}$ respectively are placed in an enclosure at $27^{\circ} \mathrm{C}$. The ratio of heat-loss of the balls will be

149610 Two circular discs $A$ and $B$ with equal radii are blackened. They are heated to same temperature and are cooled under identical conditions.
What inference do you draw from their cooling curves?

149611 A body does not emit heat energy at

149606 Read the following statements:
A. When small temperature difference between a liquid and its surrounding is doubled the rate of loss of heat of the liquid becomes twice.
B. Two bodies $\mathrm{P}$ and $\mathrm{Q}$ having equal surface areas are maintained at temperature $10^{\circ} \mathrm{C}$ and $20^{\circ} \mathrm{C}$. The thermal radiation emitted in a given time by $\mathrm{P}$ and $\mathrm{Q}$ are in the ratio $1: 1.15$
C. A Carnot engine working between $100 \mathrm{~K}$ and $400 \mathrm{~K}$ has an efficiency of $75 \%$
D. When small temperature difference between a liquid and its surrounding is quadrupled, the rate of loss of heat of the liquid becomes twice.
Choose the correct answer from the options given below:

149608 A black body radiates at two temperature $T_{1}$ and $T_{2}$ such that $T_{1} \lt T_{2}$. The frequency corresponding to maximum intensity is:

149609 Two identical metallic balls, whose temperatures are $200^{\circ} \mathrm{C}$ and $400^{\circ} \mathrm{C}$ respectively are placed in an enclosure at $27^{\circ} \mathrm{C}$. The ratio of heat-loss of the balls will be

149610 Two circular discs $A$ and $B$ with equal radii are blackened. They are heated to same temperature and are cooled under identical conditions.
What inference do you draw from their cooling curves?

149611 A body does not emit heat energy at

149606 Read the following statements:
A. When small temperature difference between a liquid and its surrounding is doubled the rate of loss of heat of the liquid becomes twice.
B. Two bodies $\mathrm{P}$ and $\mathrm{Q}$ having equal surface areas are maintained at temperature $10^{\circ} \mathrm{C}$ and $20^{\circ} \mathrm{C}$. The thermal radiation emitted in a given time by $\mathrm{P}$ and $\mathrm{Q}$ are in the ratio $1: 1.15$
C. A Carnot engine working between $100 \mathrm{~K}$ and $400 \mathrm{~K}$ has an efficiency of $75 \%$
D. When small temperature difference between a liquid and its surrounding is quadrupled, the rate of loss of heat of the liquid becomes twice.
Choose the correct answer from the options given below:

149608 A black body radiates at two temperature $T_{1}$ and $T_{2}$ such that $T_{1} \lt T_{2}$. The frequency corresponding to maximum intensity is:

149609 Two identical metallic balls, whose temperatures are $200^{\circ} \mathrm{C}$ and $400^{\circ} \mathrm{C}$ respectively are placed in an enclosure at $27^{\circ} \mathrm{C}$. The ratio of heat-loss of the balls will be

149610 Two circular discs $A$ and $B$ with equal radii are blackened. They are heated to same temperature and are cooled under identical conditions.
What inference do you draw from their cooling curves?

149611 A body does not emit heat energy at