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General
Easy
Question
Variation of internal energy with density of one mole of monatomic gas is depicted in the adjoining figure, corresponding variation of pressure with volume can be depicted as (Assuming the curve is rectangular hyperbola)
The correct answer is:
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Which of the following is the nm = T graph for a perfectly black body (nm =maximum frequency of radiation)
Which of the following is the nm = T graph for a perfectly black body (nm =maximum frequency of radiation)
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In the figure, the distribution of energy density of the radiation emitted by a black body at a given temperature is shown. The possible temperature of the black body is
In the figure, the distribution of energy density of the radiation emitted by a black body at a given temperature is shown. The possible temperature of the black body is
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Radius of a conductor increases uniformly from left end to right end as shown in fig.
Material of the conductor is isotropic and its curved surface is thermally isolated from surrounding. Its ends are maintained at temperatures T1 and T2 (T1 > T(b) : If, in steady state, heat flow rate is equal to H, then which of the following graphs is correct
Radius of a conductor increases uniformly from left end to right end as shown in fig.
Material of the conductor is isotropic and its curved surface is thermally isolated from surrounding. Its ends are maintained at temperatures T1 and T2 (T1 > T(b) : If, in steady state, heat flow rate is equal to H, then which of the following graphs is correct
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Water and turpentine oil (specific heat less than that of water) are both heated to same temperature. Equal amounts of these placed in identical calorimeters are then left in air
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Two conducting rods A and B of same length and cross-sectional area are connected (i) In series (ii) In parallel as shown. In both combination a temperature difference of 100°C is maintained. If thermal conductivity of A is 3K and that of B is K then the ratio of heat current flowing in parallel combination to that flowing in series combination is
Two conducting rods A and B of same length and cross-sectional area are connected (i) In series (ii) In parallel as shown. In both combination a temperature difference of 100°C is maintained. If thermal conductivity of A is 3K and that of B is K then the ratio of heat current flowing in parallel combination to that flowing in series combination is
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The following figure shows two air-filled bulbs connected by a U-tube partly filled with alcohol. What happens to the levels of alcohol in the limbs X and Y when an electric bulb placed midway between the bulbs is lighted
The following figure shows two air-filled bulbs connected by a U-tube partly filled with alcohol. What happens to the levels of alcohol in the limbs X and Y when an electric bulb placed midway between the bulbs is lighted
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The top of insulated cylindrical container is covered by a disc having emissivity 0.6 and thickness 1 cm. The temperature is maintained by circulating oil as shown in figure. If temperature of upper surface of disc is 127°C and temperature of surrounding is 27°C, then the radiation loss to the surroundings will be (Take 
The top of insulated cylindrical container is covered by a disc having emissivity 0.6 and thickness 1 cm. The temperature is maintained by circulating oil as shown in figure. If temperature of upper surface of disc is 127°C and temperature of surrounding is 27°C, then the radiation loss to the surroundings will be (Take
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In the following figure, two insulating sheets with thermal resistances R and 3R as shown in figure. The temperature q is
In the following figure, two insulating sheets with thermal resistances R and 3R as shown in figure. The temperature q is
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Five identical rods are joined as shown in figure. Point A and C are maintained at temperature 120°C and 20°C respectively. The temperature of junction B will be
Five identical rods are joined as shown in figure. Point A and C are maintained at temperature 120°C and 20°C respectively. The temperature of junction B will be
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Two friends A and B are waiting for another friend for tea. A took the tea in a cup and mixed the cold milk and then waits. B took the tea in the cup and then mixed the cold milk when the friend comes. Then the tea will be hotter in the cup of
Two friends A and B are waiting for another friend for tea. A took the tea in a cup and mixed the cold milk and then waits. B took the tea in the cup and then mixed the cold milk when the friend comes. Then the tea will be hotter in the cup of
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A Copper plate is soldered between two steel plates . All the plates have the same cross- section (A) and length l. The coefficient of thermal expansions are 
and their young’s moduli are 
respectively. What force will arise in the plates if the temperature is increased by 
? (Assume that the plates suffer the same net expansion)
A Copper plate is soldered between two steel plates . All the plates have the same cross- section (A) and length l. The coefficient of thermal expansions are and their young’s moduli are respectively. What force will arise in the plates if the temperature is increased by ? (Assume that the plates suffer the same net expansion)
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Heat is extracted from a 1 kg substance at a constant rate of 2 kJ/ hour. Temperature vs-Time graph is plotted. The latent heat of substance is
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A block of steel heated to 
is left in a room to cool. Which of the curves shown in figure represents the correct cooling behaviour?
A block of steel heated to is left in a room to cool. Which of the curves shown in figure represents the correct cooling behaviour?
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The energy distribution 
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is shown in the figure. As the temperature is increased the maxima will
The energy distribution with the wavelength for the black body radiation at temperature is shown in the figure. As the temperature is increased the maxima will
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Shown below are the black body radiation curves at temperatures T1 and T2 (T2>T1) . Which of the following plots is correct
Shown below are the black body radiation curves at temperatures T1 and T2 (T2>T1) . Which of the following plots is correct
physics-General
