If a graph is plotted between temperature of a body on degree Celsius (along y-axis) and degree Fahrenheit [along x-axis] at different temperatures, then the slope of the graph will be:
1. | 2. | ||
3. | 4. |
From the given heat and temperature graph of a substance, choose the correct statement:
1. | The latent heat of fusion is greater than the latent heat of vaporization. |
2. | The latent heat of vaporization is greater than the latent heat of fusion. |
3. | The specific heat in a solid state is more than the specific heat in a liquid state. |
4. | The specific heat in a liquid state is more than the specific heat in a solid state. |
The thermal conductivities of two identical rods are k and 2k, respectively. If they are joined in parallel, then the ratio of heat flowing through them per second will be:
1. 1:2
2. 2:1
3. 1:1
4. 4:1
A bimetallic strip is shown in the figure. On cooling, which shape will it attain if
1. | 2. | ||
3. | 4. |
Four rods of the same material with different radii r and length are used to connect two heat reservoirs at different temperatures. In which of the following cases is the heat conduction fastest?
1.
2. r = 3 cm, = 9 cm
3. r = 4 cm, = 8 cm
4. r = 1 cm, = 1 cm
Two rods \(\mathrm{P}\) and \(\mathrm{Q}\) of equal length and having cross-sections \(A_P\) \(A_Q\) respectively, have the same temperature difference across their ends. If \(k_P\) \(k_Q\) are their thermal conductivities, then the condition for their equal rate of conduction of heat will be:
1. \(k_PA_P = k_QA_Q\)
2. \(\frac{\sqrt{k_P}}{A_P} - \frac{\sqrt{k_Q}}{A_Q}\)
3. \(k_PA_Q = k_QA_P\)
4. \(k^2_PA_P = k^2_QA_Q\)
What is the ratio of the temperatures \(T_{1}\)
1. \(3:2\)
2. \(2:1\)
3. \(4:3\)
4. \(1:1\)
50 g of ice at \(0^{\circ} \mathrm{C}\) is dropped in a calorimeter of negligible heat capacity containing 50 g of water at \(100^{\circ} \mathrm{C}\)\(100^{\circ} \mathrm{C}\)
1. \(10^{\circ} \mathrm{C}\)
2. Below \(0^{\circ} \mathrm{C}\)
3. \(20^{\circ} \mathrm{C}\)
4. Above \(20^{\circ} \mathrm{C}\)
When the pressure on the surface of water is increased, its boiling point will:
1. | Decrease | 2. | Increase |
3. | Remain same | 4. | Increase or decrease |
Three rods made of the same material, having the same cross-sectional area but different lengths 10 cm, 20 cm and 30 cm are joined as shown. The temperature of the junction will be:-
1. \(10.8^{\circ}\mathrm{C}\)
2. \(14.6^{\circ}\mathrm{C}\)
3. \(16.4^{\circ}\mathrm{C}\)
4. \(18.2^{\circ}\mathrm{C}\)