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AIIMS 2019 Physics Heat and Thermodynamics Revision Quiz 1

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Question 1

A thermodynamical systems is changed from state (P₁, V₁) to (P₂, V₂) by two different process, the quantity which will remain same will be

Question 2

Piston of area A shown in the figure is connected to wall with the help of an inextensible string. Initially temperature of gas is T₀ and pressure is P₀ (equal to atmospheric pressure). Now temperature is increased to nT₀. Tension in the string is
Description: 139

Question 3

Internal energy of two moles of an ideal gas at a temperature of 127 °C is 1200 R. Then, the specific heat of the gas at constant pressure is

Question 4

70 calories of heat are required to increase the temperature of 2 moles of an ideal gas from 30 ° to 35 °C at constant pressure. The amount of heat required to increase the temperature of same gas through same temperature range (30 ° to 35 °C) at constant volume will be (R = 2 cal/mol-K)

Question 5

Two slabs A and B of different materials but of the same thickness are joined end to end to form a composite slab. The thermal conductivities of A and B are K₁ and K₂ respectively. A steady temperature difference of 12 °C is maintained across the composite slab. If K₁ =

, the temperature difference across slabs A is

Question 6

Root mean square speed of the molecules of ideal gas is v. If pressure is increased two times at constant temperature, then the rms speed will become

Question 7

In an isobaric process of an ideal gas. The ratio of heat supplied and work done by the system

Question 8

When 20 J of work was done on the gas, 40 J of heat energy was released. If the initial internal energy of the gas was 70 J, what is the final internal energy?

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