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If two rods of length L and 2L having coefficients of linear expansion α and 2α respectively are connected so that total length becomes 3L, the average coefficient of liner expansion of the composition rod equals: If two rods of length L and 2L having coefficients of linear expansion α and 2α respectively are connected [...]

The freezing point on a thermometer is marked as 20^o and the boiling point as 130^o. A temperature of human body (34 degree C) on this thermometer will be read as The freezing point on a thermometer is marked as 20^o and the boiling point as 130^o. A temperature of human body (34 degree C) [...]

The quantity PV/KT (k = Boltzmann’s constant) represents The quantity PV/KT (k = Boltzmann's constant) represents September 5, 2021 Category: Arihant Physics by D.C Pandey , Chapter 15 - Thermodynamics , Volume 1 ,

In the process PV = constant, pressure (P) versus density (o) graph of an ideal gas is In the process PV = constant pressure (P) versus density (o) graph of an ideal gas is September 5, 2021 Category: Arihant Physics by D.C Pandey , Chapter 15 - Thermodynamics , Volume 1 ,

A gas is expanded to double its volume by two different processes. One is isobaric and the Other is isothermal. Let W1 ​and W2 ​be the respective work done, then: A gas is expanded to double its volume by two different processes. One is isobaric and the Other is isothermal. Let W1 ​and W2 ​be [...]

A black body calorimeter filled with hot water cools from 60^∘C to 50^∘C in 4 min and 40^∘C to 30^∘C in 8 min. The approximate temperature of surrounding is : A black body calorimeter filled with hot water cools from 60^∘C to 50^∘C in 4 min and 40^∘C to 30^∘C in 8 min. The approximate [...]

For a monoatomic ideal gas undergoing an adiabatic change, the relation between temperature and volume TV^x = constant where x is : For a monoatomic ideal gas undergoing an adiabatic change the relation between temperature and volume TV^x = constant where x is : September 5, 2021 Category: Arihant Physics by D.C Pandey , Chapter [...]

Two monoatomic ideal gas at temperature T1 and T2 are mixed. There is no loss of energy. If number of their molecules are n1 and n2 respectively. The temperature of the mixture will be? Two monoatomic ideal gas at temperature T1 and T2 are mixed. There is no loss of energy. If number of their [...]

A black metal foil is warmed by radiation from a small sphere at temperature ′ T ′ and at a distance ′ d ′ . It is found that the power received by the foil is P. If both the temperature and distance are doubled, the power received by the foil will be : The [...]

A composite rod made of three rods of equal length and cross-section as shown in the fig. The thermal conductivities of the materials of the rods are K/2, 5 K and K respectively. The end A and end B are at constant temperatures. All heat entering the face A goes out of the end B. [...]