Physics question and answers for February 22, 2024
- Q Three moles of an ideal gas are in a rigid cubical box with sides of length 0 170 m The ratio of the forces that the gas exerts on each...
- Q Which process will increase the temperature of the system without heating it Adiabatic compression 79 attempts 48 1 got it right Adiabatic expansion Isothermal compression Correct 28s avg time
- Q The average kinetic energy of a monoatomic gas molecule kept at temperature 27 C is Boltzmann constant k 1 3 10 23 JK A 5 85 x 10 21 J...
- Q Two parallel metal plates are 3mm apart and have a uniform electric field strength 500 Vm between them The potential difference between the plates is 1 15 Volt Val 2...
- Q One end of horizontal thick wire of length 2L and radius 2R is connected to one end of another horizontal wire of length L and radius R If equal forces...
- Q 65 In a typical lightning flash a ch transferred between two points at a potentia difference of 10 volt If all the energy released could be used to melt ice...
- Q 9 36 An ideal gas is taken through series of changes ABCA The amount of work involved in the cycle is A PA 4P 1 P 1 1 12P V...
- Q gure shows a cyclic process ABCDBEA performed on an ideal gas If PA 2 atm PB 4 5 atm and Pc 6 atm VE 0 05 litre find the work...
- Q 24 The specific heat of many solids at low temperatures varies with absolute temperature T according to the relation S AT3 where A is a constant The heat energy required...
- Q Q29 A double pan window used for insulating a room thermally from outside consists of two glass sheets each of area 1 m and thickness 0 01 m separated by...
- Q 8 A quantity of a substance in a closed system is made to undergo a reversible process from an initial volume of 3 m and initial pressure 105 N m...
- Q Q 5 b A system undergoes a change of state from 1 to 2 along path A during which heat transferred from the system is 40 KJ and the work...
- Q 8 MV 2R 4 MV R When Q amount of heat is given to a gas at constant 3 pressure it performs amount of work The average 3 number of...
- Q At an instant t 0 Block A of mass 1 kg is moving with speed 8 m s towards right on rough surface of block B of mass 3 kg...
- Q Given T P curve for three processes Work done in process 1 2 and 3 if initial and final pressure are same for all processes is W W W3 respectively...
- Q A monoatomic gas y compressed to adiabatically then the pressure of the gas will change to Question Type Single Correct Type 1 24 5 2 8 3 40 3 5...
- Q The state equation V T constant represents A VITRI Options isothermal change R Oiso basic change R Oiso chronic change da O adiabatic change
- Q Q 9 A system is taken through a cyclic process represented by a circle as shown The heat absorbed by the system is V in cc 40 30 20 0...
- Q 2 8 One mole of a gas expands obeying the relation as shown in P V diagram The maximum temperature in this process is equal to 1 PA Por Po...
- Q 18 Neutral gas molecules each of mass m are at a temperature T in a container at zero gravity Ho does the average de Broglie wavelength A of a molecule...
- Q The ends of metal rod are maintained at temperature 120 C and 150 C The rate of heat flow in the rod is found to be 10 J s If...
- Q 28 An ideal gas is subjected to cyclic process involving four thermodynamic states the amounts of heat Q and work W involved in each of these states Q 6000 J...
- Q lic pro ess as V graph above If the system consists of an ideal gas of n moles What will be the total work done during the cycle TA 2To...
- Q 10 A vessel contains 6 g of oxygen at pressure P and temperature 400 K A small hole is made in it so that oxygen leaks out How much oxygen...
- Q A heat engine goes through one complete cycle arriving back at its initial starting point How has the total thermal energy of the gas changed It depends on the work...
- Q 39 If the P V diagrams of two thermodynamics devices working in a cyclic process are as shown in the figure then 0 V A 1 A is a heat...
- Q Cement is T Pg 327 cules in a iner total is elastic egree of ure only gas gy the do 7 Three moles of oxygen are mixed with two moles...
- Q In a dairy operation milk at a flow rate of 250 liter hour and a cow body temperature of 58 3 C must be chilled to a safe to store...
- Q For the free expansion of an ideal gas under adiabatic conditions which of the following is true Q W 0 and AU O Q 0 W 0 and AU W...
- Q 15 The molar heat capacity in process of diatomic gas if it does a work when a heat Q is supplied to it is y 7 5 15R 1 4...
- Q An ideal gas is taken around the cycle ABCA as shown in the P V diagram The total work done by the gas during the cycle is PV 2PV 4PV...
- Q One mole of an ideal gas at an initial temperature of TK does 15R joules of work adiabatically If the ratio of specific heats of this gas at constan pressure...
- Q Q16 An ideal monatomic gas is confined in a horizon tal cylinder by a spring loaded piston as shown in the figure Initially the gas is at temperature T pressure...
- Q x10 3 mol of gas undergoes the process shown in the figure gure 1 re p atm 3 2 1 1 of 1 Part C If the constant volume of...
- Q A step down transformer connected to an ac mains supply of 220 V is made to operate at 11 V 44 WX lamp Ignoring power losses in the transformer what...
- Q The pressure in a monoatomic gas increases volume increases from Vo to 2Vo The increase in internal energy is P 3P Po Vo O V 2V 15P Vo O 7...
- Q 2 13 In the figure shown here the work done in the process ACBA is Pressure 3Po Po 0 eqx9 1 4P Vo A SO B Chidupl Vo Volume 3Vo...
- Q Three moles of nitrogen is mixed with six moles of helium The effective molar specific heat of the mixture at constant volume is 1 7 R 1 4 R 1...
- Q One mole of a diatomic gas is taken around a cyclic process shown in the figure The process BC is adiabatic expansion 2P and the process CA is isothermal compression...
- Q 2 Carbon monoxide is carried around a P closed cyclic process abc in which be is an isothermal process as shown in figure The gas absorbs 7000 J of heat...
- Q 10 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 The...
- Q 3 A thermodynamic process is shown in figure The pressures and volumes corresponding to some points in the figure are P 3 10 Pa Pg 8 10 Pa and V...
- Q 13 The relation between internal energy U pressure P and volume V of a gas in an adiabatic process is U a bPV where a and b are constants What...
- Q 9 Heat energy absorbed by a system in going through a cyclic process shown in figure is 1 10 m J 3 10 m J 2 10 J 4 10...
- Q 1 5 2 8 3 6 4 6 5 11 A reversible engine converts one sixth of the heat input into work When the temperature of the sink is reduced...
- Q 3 Certain amount of an ideal gas is contained in a closed vessel The vessel is moving with a constant velocity v The molecular mass of gas is M The...
- Q 1 One mole of an ideal monatomic gas requires 210 J heat to raise the temperature by 10 K when heated at constant temperature If the same gas is heated...
- Q The efficiency of a heat engine increases by 20 when temperature of source is increased by 20 and temperature of sink is decreased by 20 simultaneously The old efficiency of...
- Q 1 cm of water at its boiling point absorbs 540 calories of heat to become steam with a volume of 1671 cm If the atmospheric pressure 1 013 x 105...
- Q while some are process variables Some grouping of the parameters are given Choose the correct one 1 State variables Temperature No of moles Process variables Internal energy work done by...
- Q Suppose heat is lost from the lateral surface of a thin rod of length L into a surrounding medium at temperature zero If the linear law of heat transfer applies...
- Q 3 2 1 4 16 1 141 An ideal gas with pressure P volume V and temperature T is expanded isothermally to volume 2V and a final pressure P The...
- Q Select an incorrect statement relating to a Carnot cycle O a Work occurs for all four processes O b There are two adiabatic processes O c There are two constant...
- Q Helium is to be compressed from 150 kPa and 360 K to 600 kPa and 500 K A heat loss of 15 kJ kg occurs during the compression process Neglecting...
- Q Find the instantaneous velocity at t 3 5 s from the graph given below w x 25 50 75 100 125 150 175 1 2 1 4 9 CI Axi...
- Q Which of the following is true for a closed system a mass does not enter or leave the system b none of the mentioned c mass entering can be more...
- Q A Carnot cycle is a cycle of special interest because a When it is carefully constructed in a laboratory it provides an upper limit on cycle efficiency O b It...
- Q hermodynamic processes are indicated in the following diagram Match the following Column 1 P Process I Q Process II R Process III S Process IV 111 700K 500 K 300...
- Q of an ideal diatomic gas undergoes 34 a transition from A to B along a path AB as shown in the figure Pin kPa 5 EN 2 A 4 Vin...
- Q A cylindrical container having non conducting walls is partitioned in two equal parts such that the volume of each part is V Amovable non conducting piston is kept between the...
- Q 16 Heat energy absorbed by a system going through a cyclic process as shown in figure is V litre 30 10 10 1 107 J 30 P kPa 2 10...
- Q The work done by the system in the cyclic process as show in figure is V cm 500 300 10 J 3 14 J 8 43 J 40 60 P...
- Q An ideal gas undergoes the following process as shown in the figure The same process may be represented by chef zeny zgur A4 95 13 Uca ch fac u uffa...
- Q SolveLancer Test 2 moles of a gas is heated from 27 C to 37 C at constant pressure The amount heat required is 80 cal When the same gas is...
- Q Answer A B Thevenin resistance is found by D Shorting all voltage sources Opening all current sources C Shorting all voltage sources and opening all current sources Opening all voltage...
- Q The land area required for installation of nuclear power plant is Answer A more than thermal power plant B C D less than thermal power plant equal to thermal power...
- Q An ideal gas undergoes a process as shown in the figure At state C 5Vc VA The C pressure of the gas at C is 1 2 X x 10...
- Q View in English An ideal gas has 3 rotational degrees of freedom and 3 translational degrees of freedom The ratio of molar specific heat of the gas at constant pressure...
- Q 1 1 5 x 105 N m 2 3 x 105 N m 3 2 1 x 105 N m 4 In changing the state of a system from state...
- Q A fixed mass of a gas is first heated isobarically to double the volume and then cooled isochorically to decrease the temperature back to the initial value By what factor...
- Q 1 5 2 6 3 7 If 1 kg air y 1 4 is heated adiabatically from 0 C to 10 C then increase in its internal energy will be...
- Q 1 3P V 2 3P V 3 6P V 4 12P V The volume of air increases by 5 in its adiabatic expansion The percentage decrease in its pressure will...
- Q 0 At constant pressure when a monatomic ideal gas is heated from temperature T to T it does 40 J of work The heat supplied to the gas during this...
- Q Which statement is incorrect All reversible cycles have same efficiency 2 Reversible cycle has more efficiency than an irreversible one 3 Carnot cycle is a reversible one 4 Carnot cycle...
- Q A monoatomic gas at a pressure P having a volume V expands isothermally to a volume 2V and then adiabatically to a volume 16V the final pressure of the gas...
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