MEDIUM
Physics
IMPORTANT
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Heat is supplied to a certain homogenous sample of matter, at a uniform rate. Its temperature is plotted against times as shown.
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Which of the following conclusions can be drawn?

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Important Questions on Thermometry, Thermal Expansion and Calorimetry

EASY
Physics
IMPORTANT

 Refer to the plot of temperature versus time (Figure) showing the changes in the state of ice on heating (not to scale). Which of the following is correct?

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MEDIUM
Physics
IMPORTANT

Two metal plates A and B made of same material are placed on a table as shown in the figure. If the plates are heated uniformly, the gaps indicated by x and y in the figure,

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EASY
Physics
IMPORTANT
Two rods of length L1 and L2 are made of materials of coefficients of linear expansions α1 and α2 respectively such that L1α1=L2α2. The temperature of the rods is increased by T and correspondingly the change in their respective lengths be L1 and L2
EASY
Physics
IMPORTANT

A bolt is passed through a pipe and a nut is just tightened. Coefficients of linear expansion for bolt and pipe material are αb and αp respectively. If the assembly is heated then:

HARD
Physics
IMPORTANT
The temperature of an isotropic cubical solid of length l0, density ρ0 and coefficient of linear expansion α is increased by 20°C. Then at higher temperature, to a good approximation:-
EASY
Physics
IMPORTANT

1 g of steam at 100°C melts to how many grams of ice at 0°C ? (Latent heat of ice =80 cal g-1 and latent heat of steam =540 cal g-1)

MEDIUM
Physics
IMPORTANT

2 kg of ice at -20°C is mixed with 5 kg of water at 20°C in an insulating vessel having a negligible heat capacity. Calculate the final mass of water (in kg) remaining in the container.