MEDIUM
Physics
IMPORTANT
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If a thermometer reads freezing point of water as 20°C and boiling point as 150°C, how much thermometer would read when the actual temperature is 60°C?

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Important Questions on Thermometry, Thermal Expansion and Calorimetry

EASY
Physics
IMPORTANT

The figure shows a glass tube (linear coefficient of expansion is α) completely filled with a liquid of volume expansion coefficient γ. On heating, length of the liquid column does not change. Choose the correct relation between γ and α.

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EASY
Physics
IMPORTANT

The graph shows the variation of temperature (T) of one kilogram of a material with the heat (H) supplied to it. At O, the substance is in the solid state. From the graph, we can conclude that

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EASY
Physics
IMPORTANT

Two substances A and B of equal mass m are heated at a uniform rate of 6 cal s-1 under similar conditions. A graph between temperature and time is shown in the figure. The ratio of heat absorbed HAHB by them for complete fusion is

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MEDIUM
Physics
IMPORTANT

A student takes 50 g wax (specific heat=0.6 kcal kg °C and heats it till it boils. The graph between temperature and time is as follows. Heat supplied to the wax per minute and boiling point are respectively

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EASY
Physics
IMPORTANT

The figure given below shows the cooling curve of pure wax material after heating. It cools from A to B and solidifies along BD. If L and C are respective values of latent heat and the specific heat of the liquid wax, the ratio L/C is

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MEDIUM
Physics
IMPORTANT
There are two balls of same metal weighing 5 gm and 10 gm which strike a target with the same velocity. The heat energy so developed is used for raising their temperature alone. Then, the temperature will be higher
HARD
Physics
IMPORTANT
A rod of length 20 cm is made of metal. It expands by 0.075 cm when its temperature is raised from 0°C to 100°C. another rod of a different metal B having the same length expands by 0.045 cm for the same change in temperature. A third rod of the same length is composed of two parts, one of metal A and the other of metal B. This rod expands by 0.060 cm for the same change in temperature. The portion made of metal A has the length:
MEDIUM
Physics
IMPORTANT

Density of a substance at 0C is 10 g cc-1 and at 100°C, its density is 9.7 g cc-1. The coefficient of linear expansion of the substance will be