Physics question and answers for March 07, 2024
- Q the above A cylindrical metal rod of length L and thickness d is shaped into a ring with a small gap x as shown On heating the system 1x1 a...
- Q wires of equal length are suspended as shown in figure Their Young s modulii are Y and Y respectively The equivalent Young s modulii will be 1 Y Y 3...
- Q Steel rod at 40 C is observed to be 1 m long when measured by a brass scale which is correct at 0 C correct length of the steel rod...
- Q Click to see additional instructions 23 A particular sidewalk in a northern city is made up of a series of 1 5 meter long stone slabs whose coefficient of thermal...
- Q After sunset on a hot summer day the bricks in the wall of a building feel warm but the glass windows do not Why The bricks have a higher heat...
- Q The coefficient temperature in Your Answer of linear expansion of lead is 29 0 x 106 K 1 What change in K will cause a 5 40 m long lead...
- Q 400 cm of mercury at 0 C will expand to what volume at 50 C Mercury has a volume expansion coefficient of 180 x 106 c 422 8 cm 409...
- Q When heat transfers from warmer to cooler, the molecules ______ .(A) move closer and speed up(B) move closer and speed up(C)spread out and speed up(D)move closer and slow down
- Q A surveyor has a steel measuring tape that is calibrated to be 100.000 m long (.e., accurate to+-1 mm) at 20C.If she measures the distance between two stakes to be...
- Q In the laboratory a student finds that it takes 61.0 Joules to increase the temperature of 12.7 grams of solid zinc from 22.1 to 35.4 degrees Celsius. The specific heat...
- Q An aluminum rod is 23.4 cm long at 20C and has a mass of 350 g. If 15,000 J of energy is added to the rod by heat, what is...
- Q The ends Q and R of two thin wires, PQ and RS, are soldered (joined) together. Initially, each of the wire has a length of 1 m 10C. Now, the...
- Q An aluminum (a = 24 x 10-6/K) pan (diameter = 23 cm, height = 6 cm) is filled with water (B = 0.21 x 10^-3/K). The initial temperature is 19...
- Q An old tank can fill up to 1L of pink liquid at 15C, but at this temperature volume of the liquid in this tank is only 0.93L. If the coefficient...
- Q A steel beam being used in the construction of a skyscraper has a length of 32.000 m when delivered on a cold day at a temperature of 12.000F. What is...
- Q You have a Pyrex beaker what has a volume of 3 liters. It is filled to the very top with turpentine when both the beaker and the turpentine are 150....
- Q A student walking to class on a cold day (T = 1 C) find a silver ring with an inner diameter of D = 1.55 cm. The silver has a...
- Q A disk between vertebrae in the spine is subjected to a shearing force of 643 N. Find its shear deformation, using the shear modulus of 1.0 x 10? N/m. The...
- Q The temperature of 250 liters of ethyl alcohol is increased from 294 K to 324 K. The coefficient of volume expansion for ethyl alcohol is 1.12 x 10-4 per Celsius...
- Q Two rods A and B of identical dimensions are at temperature 30C. If A is heated upto 180C and B upto TC, then the new lengths are the same. If...
- Q Years ago, a block of ice with a mass of about 20 kg was used daily in a home icebox. The temperature of the ice was 0.0C when delivered. As...
- Q You are using a Type K thermocouple to measure the temperature of a process that operates in the range of 1000C to 1100C. In particular, you know that the thermoelectric...
- Q An aluminum rod is 17.4 cm long at 20C and has a mass of 350 g. If 15,000 J of energy is added to the rod by heat, what is...
- Q 14. Which of the following statements is true concerning a change of phase?a. All heat goes into the phase change while more than one phase is present.b. If water is...
- Q A cylindrical steel tank has an internal diameter of 2m and height of 3m. It is filled with gasoline in the morning when the recorded temperature was 8 C. In...
- Q How large an expansion gap should be left between steel railroad rails if they may reach a maximum temperature 35C greater than when they were laid? Their original length is...
- Q In a resonance tube experiment the 1st resonance is obtained for 10 cm of air column and the second for 31 cm The end correction for this apparatus is 1...
- Q An insulated container holds 0 67 kg of water at 13 C Calculate the mass of 90 C water that must be added so that the final equilibrium temperature is...
- Q 0 Three liquids of masses in the ratio 2 3 4 and specific heat ratio 2 2 5 are having temparatues 40 C 60 C 80 C Find resultant temparature...
- Q 26 An aluminium sphere is dipped into water Which of the following is true a Buoyancy will be less in water at 0 C than that in water NCERT Exemplar...
- Q are as registered by 8 A centigrade and a Fahrenheit thermometer a dipped in boiling water The water temperature is lowered until the Fahrenheit thermometer registers d 80 140 What...
- Q The specific heat c of a solid at low temperature shows temperature dependence according to the relation c DT where D is a constant and T is the temperature in...
- Q A thermometer of mass 50 gm and specific heat 0 4 cal gm C reads 10 C It is then inserted into 1 kg of water and reads 40 C...
- Q If a hybrid DNA molecule labelled with N15 is allowed to replicate four times in culture medium having N14 the percentage of hybrid DNA after third generation would be Only...
- Q 4 The specific heat of water 4200 J kg K and the latent heat of ice 3 4 x 105 J kg 100 grams of ice at 0 C is...
- Q For each question marks will be awarded in one of the following categories Full Marks 4 If only the correct answer is given Zero Marks 0 In all other cases...
- Q Heat is given at constant rate to the substance X which is initially at 250K Its temperature v s time graph is given Here S S are specific heat capacities...
- Q One gram vapour at 100 C is added in a calorimeter which contains 20 g mixture of water and ice in equilibrium to just melt the ice completely Then the...
- Q 0 C 31 A block of wood is floating on water at 0 C with 31 h cichsten Ta RIGHT VI ER BR certain volume V above water level the...
- Q 27 a If the coefficient of volume expansion of a material is 110 105 C Calculate the fractional change in density for a 30 C rise in temperature 3 b...
- Q Part A If 20 of the gravitational potential energy of the water went into heating the water by how much would the temperature of the water increase in going from...
- Q e What do you mean by viscosity index and explain all the terms involved in formula A coal has the following composition by weight C 90 O 3 S 0...
- Q Two identical beakers A and B contain equal two different liquids at 60 C each and left to cool down Liquid in A has density of 8x102 kg m and...
- Q A metal bar with a mass of 3 0kg is placed in boiling water until its temperature stabilizes at 100 0 C The bar is then immersed placed in 500...
- Q 5 g of water at 30 C and 5 g of ice at 20 C are mixed together in a calorimeter What is the final temperature of the mixture Given...
- Q 8 0 16 g of oxygen is kept in a rigid container and is heated Find the amount of heat required to raise the temperature from 35 C to 45...
- Q 1 A container of base of area S 200 cm and negligible heat capacity contains a mixture of water and ice each of mass m 1 0 kg and placed...
- Q Equal masses of two different liquids are put into identical beakers Liquid 1 is heated for 100s and liquid 2 is heated for 200s by heaters of the same power...
- Q b Ice cubes of total mass 70g and at 0 C are put into a drink of lemonade of mass 300 g All the ice melts as 23500J of thermal...
- Q 7 A block of ice at 20 C is heated until it turns to steam The graph of temperature against thermal energy absorbed is shown The latent heat of fusion...
- Q 2 A ball of thermal capacity 10 cal C is heated to the 22 10 ure the va temperature of furnace It is then transferred into a vessel containing water...
- Q water and ice are 4200 J kg C and 2100 J kg C respectively specie latent heat of fusion of ice is 330 kJ kg and thermal conductivity of it...
- Q 58 An electric kettle takes 4 A current at 220 V How much time will it take to boil 1 kg of water from temperature 20 C The temperature of...
- Q A mixture of 100 gm of ice 200 gm of water at 0 C is kept in a copper vessel of water equivalent 70 gm If steam at 100 C...
- Q Steam at 100 C is passed into 20g of water at 10 C When water acquires a temperature of 80 C the mass of water present will be Take specific...
- Q Water of volume 2 L in a container is heated with a coil of 1 kW at 27 C The lid of the container is open and energy dissipates at...
- Q You have two identical small calorimeters and a very accurate thermo meter In one calorimeter is 100 g water at room temperature and in the other is 100 g boiling...
- Q Steam at 100 C is allowed to pass into a vessel containing 10g of ice and 100g of water at 0 C until all the ice is melted and the...
- Q Calculate the amount of heat energy required to change 0 713 kg of water at a temperature of 50 C to steam at a temperature of 170C specific heat capacities...
- Q 30 Choose the correct graph of the variation of specific heat capacity of water with temperature 1 005 1 Specific heat Calg C 2 1004 1000 heal Calig C 0...
- Q 2 26 On an X temperature scale water freezes at 125 X and boils at 375 X On a Y temperature scale water freezes at 70 Y and boils at...
- Q The cooling curves 1 and 2 of two liquids of same mass Sp heats S and S are cooled under identical conditions as shown in the graph Then A S...
- Q Choose the correct statement A Steam causes more severe burns than water at 100 C B In extinguishing fire hot water is preferred to cold water C Ice at produces...
- Q A clock with a metal pendulum beating seconds keeps correct time at 0 C If loses 12 5 s a day at 25 C the coefficient of linear expansion of...
- Q 2 Under which of the following conditions resistance of a cylindrical specimen of an Ohmic material is least affected by small temperature variations a Temperature coefficient of resistivity is greater...
- Q 3 40 4 120 If a thermometer reads freezing point of water as 20 C and boiling point as 150 C how much thermometer read when the actual temperature is...
- Q Two cylindrical rods each of length L are joined in parallel Their thermal conductivity are and k Their circular area of cross section are A and 2A respectively The equivalent...
- Q 15 A small block of copper with a specific of 100 calories C is initially at a temperature of 540 C It is ther dropped into a large on entropy...
- Q c x 18 Two substances A and B of equal mass m are heated under similar conditions A graph between temperature and time is shown in at uniform rate of...
- Q 17 Which of the following phenomenon gives evidence of the molecular motion 1 Brownian motion 2 Diffusion 3 Evaporation 4 All of these 18 Volume versus temperature graph of two...
- Q If we plot a graph having temperature in C on X axis and in F on Y axis then the shape is a straight line The correct statement is A...
- Q An aluminium sphere of 100 ce volume is heated from 0 C to 100 C Its volume changes by given that coefficient of linear expansion for aluminium a AI 20...
- Q Which of the following statement s is are correct B C D Boiling point of ordinary water is greater than heavy water Temperature of maximum density for ordinary water is...
- Q A hot vanadium solid cylinder weighing 30 kg is submerged in an insulating bath holding 50 L of heavy oil The vanadium cylinder and the oil are allowed to equilibrate...
- Q 2 26 An electric heater is used in a room of total wall area 137 m to maintain a temperature of 20 C inside it when the outside temperature is...
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