Physics question and answers for February 21, 2024
- Q The ratio of rms speed and most probable speed of molecules of an ideal gas is R at temperature T If the temperature is increased by 2 then the percentage...
- Q eversi Let AW be the work done in quasi static thermodynamic process Which of the following statements about AW is correct a AW is a perfect differential if the process...
- Q The work done by a gas taken through the closed process ABCA is O 6Povo O 4Po Vo O Povo Tem
- Q Two ideal Carnot engines operate in Cascade all heat given up by one engine is used by the other engine to produce work between temerature T and T The temperature...
- Q According to maxwell s distribution of molecular speeds for the below graph for two different samples of gasses A and B at temperature T and T respectively which of the...
- Q 26 Two rods one made of copper and the other steel of the same length and cross sectional area are joined together The thermal conductivity of copper is 385 J...
- Q 4 48 cyclic A refrigerator whose coefficient of performance is 6 extract heat from cooling compartment at the rate of 300 J cycle How much heat per cycle is rejected...
- Q 94 One mole of an ideal gas at initial temperature T undergoes a quasi static process during which the volume V is doubled During the process the internal energy U...
- Q Consider a monoatomic ideal gas occupying a volume of 22 4 litre at 0 C and 1 atm pressure The work required to compress this gas isothermally to a volume...
- Q A gas takes part in three thermal processes in which it is heated from the same initial state to the same final temperature The process are shown on the P...
- Q The volume V of a diatomic gas varies with its temperature T as shown in the graph The ratio of work done by the gas to the heat absorbed by...
- Q One mole of an ideal gas undergoes a thermodynamic cyclic process as shown in the figure The cyclic process consists of an isochoric an adiabatic process and an isothermal may...
- Q The molar heat capacity at constant volume of oxygen gas at STP is nearly 5R and it approaches 2 7R as the temperature in increased This happens 2 because at...
- Q 23 A gas at initial temperature T undergoes sudden expansion from volume V to 2V Then a The process is adiabatic b The process is isothermal c The work done...
- Q and 30 Chis iges Alls 0 0 994 cm 6 A parallel beam of light 2 5890 A is incident on thin glass plate u 1 5 such that the...
- Q 2016 97 The temperature inside a refrigerator is t C and the room temperature is t C The amount of heat delivered to the room for each joule of electrical...
- Q three level system has energies zero E and 2E The level with zero energy is non degenerate v he level with energy E and 2E is doubly and triply degenerate...
- Q 473 eaction 2062 65 Ink 4 814 T K Enthalpy of the reaction AH at 25 C is 80 kJ 17 12 kJ 34 24 kl L expression for equilibrium...
- Q The figure shows a frictionless cylindrical piston that seals and floats freely on compressed gas in a cylinder of initial temperature 30 C The temperature is increased to 325 C...
- Q 0 If internal energy U of an ideal gas depends on pressure p and volume of the gas according to equation U 3pV which of the following conclusions can you...
- Q Consider a system which has two energy levels one of energy Eo 0 with a degeneracy of two and the other of energy E 1 38 1023 J with a...
- Q 25 A student in an experimental study of a process 1 2 3 on an ideal ga prepares two graphs to show relations between absolute temperature pressure P and volume...
- Q sider the following figure The x axis is marked in increments of 1 m tical axis is P Pa Point is located at 1 6 105 and point is located...
- Q A Carnot engine has an efficiency of 20 when the temperature of the sink is 120 F Then the efficiency is increased to 80 by changing the source temperature only...
- Q Three particles have to be accommodated in four available states Calculate the number of ways in whic this can be done if the particles obey a Classical statistics b B...
- Q A litre of dry air at STP expands adiabatically to a volume of 3 litres If y 1 40 the work done by air is 314 4 6555 Take air...
- Q A carnot engine em change in temperature cy 40 and ten of source An ideal refrigerator is working between temperature 27 C and 127 C If it expells 120 calo...
- Q 19 Which of the following methods will enable the volume of ideal gas to be increased four times 1 Double the temperature and reduce the pressure to half 2 Double...
- Q A balloon filled with of 1 0 g of hydrogen is in thermal equilibrium air in a room Root mean square speed of air molecules at the temperature is 500...
- Q 9 A piston can slide which contains an ideal mono atomic gas The piston and surface of the cylinder are coated with a thin layer of a pe insulating material...
- Q 3 An ideal gas with adiabatic exponent y goes a cyclic process as shown in figure Within Te which the absolute temperature varies with n 4 Fold 4 The percentage...
- Q CTQ 28 P V plots for two gases during adiabatic process are shown in the figure Plots 1 and 2 should correspond respectively to a He and O c He...
- Q 10 Mathematic 30 English 5 Q4 The average energy of the He atom on the surface of the sun which is at a temperature of 6000 K is Given that...
- Q A reversible refrigerator operates between a low temperature reservoir at 7 and a high temperature reservoir at 71 Its coefficient of performance is given by TH TLYTH ON 00 TH...
- Q A cylindrical vessel is divided in two parts by a fixed partition which is perfectly heat conducting The wall and piston are thermally insulated from surroundings The left side contains...
- Q 4 16 An imaginary engine receives heat and does work on a slowly moving piston at such rates that the cycle of operation of 1 kg of working fluid can...
- Q 3 The average translational energy and the r m s speed of molecules in a sample of oxygen gas at 300 K are 6 21 10 1 J and 484...
- Q 12 V t graph is obtained as shown in the figure The work done by the force is represented by the graph 1 PQ 2 QR V P 3 RS...
- Q 3 On what factors does the efficiency of Carnot engine depend 4 What are two essential features of Carnot s ideal heat engine 5 Plot a graph between internal energy...
- Q One mole of an ideal monoatomic gas requires 210 J heat to raise the temperature by 10K when heated at constant pressure If the same gas is heated at constant...
- Q Three samples of the same gas A B and C y 3 2 have initially equal volume Now the volume of each sample is doubled The process is adiabatic for...
- Q 15 Entropy of a system decreases 1 When heat is supplied to a system at constant temperature 2 When heat is taken out from the system at constant temperature 3...
- Q Figure shows a cylinder of cross sectional area A and total length 4L containing n moles of oxygen each at temperature T and T K are separated by a fixed...
- Q View in English A certain quantity of O y 7 5 is compressed isothermally until its pressure is doubled P the gas is then allowed to expand adiabatically until its...
- Q n an total If a gas absorbs 200 J of heat and expands by 500 cm3 against constant pressure of 2 x 105 Nm then change in internal energy is...
- Q Which of the following statements is correct 1 Two isothermal curves may intersect 2 Two adiabatic curves may intersect 3 Two different states of gas can be connected by an...
- Q The pressure and volume of an ideal gas are related as pa for process A B as shown is figure The pressure and volume at A are 3p and respectively...
- Q the cell Pb For s Pb 1M Ag 1M Ag s if concentraton of an ion in the anode compartment is increased by a factor of 10 the emf of...
- Q c 250 K d 250 C 49 p V diagram of an ideal gas is as shown in figure Work done by the gas in the process ABCD is P...
- Q 15 15 In a mechanical refrigerator the low temperature coils are at a temperature of 23 C and the compressed gas in the condenser has a temperature of 27 C...
- Q c 40 kg d 50 kg 67 A gas at the temperature 250 K is contained in a closed vessel If the gas is heated through 1K then the percentage...
- Q 1 The following sets of values for Cy and Cp of a gas have been reported by different students The units are cal mole 1 K Which of these sets...
- Q 70 calories of heat are required to raise the temperature of 2 moles of an ideal gas at constant pressure from 30 C to 35 C The amount of heat...
- Q A gas expands from i to along the three paths indicated The work done along the three paths denoted by W W and W have the relationship 123456 W a...
- Q a 0 495 kg c 0 695 kg 25 A cyclic process is shown in the figure Work done during the cyclic process ABCDA is 2x10 4 1 x 102...
- Q A sphere and a cube of same material and same total surface area are placed in the same evacuated space turn by turn after heating to the same temperature Find...
- Q A gas expands in a frictionless piston cylinder arrangement The expansion process is very slow and is resisted by an ambient pressure of 100 kPa During the expansion process the...
- Q Difficulty Level Easy Question N moles of monoatomic gas having translational KE 2U per molecule are mixed adiabatically inside a rigid boundry container with N moles of diatomic gas having...
- Q Which of the following relationships is valid only for reversible processes undergone by a closed system of simple compressible substance neglect changes in kinetic and potential energy 1 SQ dU...
- Q An ideal diatomic gas undergoes a process AB for which PV indicator diagram is shown Temperature at state A is To When process changes from endothermic to exothermic temperature of...
- Q 3P P P B A C 3V V Al mole of ideal gas initially at Pi 1 Pa Vi 5 m and Ti 0 C is taken through a cycle...
- Q he se K nt ge es 65 Figure shows the isotherms of a fixed mass of an ideal gas at three temperatures TA TB and Tc then A 1 TA...
- Q A non conducting piston of mass m and are So divides a non conducting closed cylinder as shown in the figure A piston having mass m is connected with the...
- Q An ideal gas expands according to the law PZV constant The internal energy of the gas 1 Increases continuously 2 Decreases continuously 3 Remains constant 4 First increases and then...
- Q Patm 76 cm of Hg Given Fatm Air 12 cm Air fig 1 Hg 45 fig 4 8 cm OL Hg Air fig 2 Air Hg When the tube is...
- Q Q 8 Between two isotherms at temperatures 27 and T a process ABCD is performed with an idea monatomic gas AB and CD are adiabatic expansion processes and BC is...
- Q CO mic gas undergoes a cyclic process abc as shown on temperature volume T V diagram as shown Hence TA not an isobaric Process fust a graph alo do like...
- Q 174 1 4 44 42 6 The average degree of freedom per molecule for a gas is 6 The gas performs 25 of work when it expands at constant pressure...
- Q c 600J d 900J 6 One mole of an ideal monatomic gas at To expands slowly according to the law temperature constant constant If the final temperature is 2To heat...
- Q The P V diagram of a gas undergoing a cyclic process ABCDA is shown in the graph where P is in N m2 and V in cm Identify the incorrect...
- Q A mono atomic ideal gas y 1 67 molecular weight 40 is compressed adiabatically from 0 1 MPa 300 K to 0 2 MPa The universal gas constant is 8...
- Q An insulator container contains 4 moles of an ideal diatomic gas at temperature T Heat Q is supplied to this gas due to which 2 moles of the gas are...
- Q The pressure P of n moles of an ideal gas varies with volume V as P a bV2 where a and b are positive constants The highest absolute temperature to...
- Q What is the entropy change when I mole oxygen gas expands isothermally and reversibly from an initial volume of 10 L to 100 L at 300 K 300 R RR...
- Q ideal diatomic gas goes through a cycle consisting of two isochoric and two isobaric lines The slute temperature of the gas rises 5 times both in the isochoric heating and...
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