Physics question and answers for March 08, 2024
- Q a 9 kg b 0 5 kg c 1 5 kg Two rods A and B of identical dimensions are at temperature 30 C If A is heated upto 180...
- Q The coefficient of volume expansion of a liquid is 49 10 5 K Calculate the fractional change in its density when the temperature is raised by 30 C 7 5...
- Q A cylindrical metal rod of length Lo is shaped into a ring with a small gap as shown On heating the system X d r x decreases r and d...
- Q 1 A lamina copper is 100 cm long and 15 cm broad at 273 K The area of cross section increases by 2 cm at 100 C What will be...
- Q 22 A bubble of 8 mole of helium is submerged at a certain depth in water The temperature of water increase by 60 C How much heat is added approximately...
- Q 23 A lake is covered with ice 2 cm thick The temperature of ambient air is 15 C Find the rate of thickening of ice For ice k 4 x...
- Q Two rods one of aluminum and the other made of steel having initial length and 12 are connected together to form a single rod of length 1 1 The coefficients...
- Q 1 The coefficient of apparent expansion of a liquid when determined using two different vessels A and B are Y and Y2 respectively If the coefficient of linear expansion of...
- Q A metal rod of silver at 0 C is heated to 100 C Its length is increased by 0 19 cm Coefficient of cubical expansion of the silver rod is...
- Q Assume that specific heat capacity of a material increases with increase in temperature If equal amount of the substance is mixed in isolation at two different temperatures T K and...
- Q Rank the energy savings potential of the following EE technologies systems from highest to lowest Discuss the expected performance of a building which integrates two or more of the following...
- Q 1 A uniform cylindrical rod of length L and radius r is made from a material whose Young s modulus of elasticity equals Y When this rod is heated by...
- Q Two cylinders of equal size are filled with equal amount of ideal diatomic gas at room temperature Both the cylinders are fitted with pistons In cylinder A the piston is...
- Q 13 The change in volume in cm of a metal sphere of radi 10 cm when its temperature is increased from 10 C 60 C is Given that coefficient of...
- Q An uranium 235U fission reaction produces 92 216 MeV The amount of 235U required to run a 92 100 MW nuclear power plant for a day with 100 efficiency is...
- Q Steel wire of length L at 40 C is suspended from the ceiling and then a mass m is hung from its free end The wire is cooled down from...
- Q PHYSICS A semi circular disc of radius R is placed on a smooth horizontal surface Figure shows top view of this If temperature is increased by At then displacement of...
- Q 21 a An oil trucker loaded 40000 liters of certain fuel during his travel He reached the destination where the temperature was 20 C lower than that of the temperature...
- Q A thermally insulated vessel contains an ideal gas of molecular mass M and ratio of specific heats y It is moving with speed v and is suddenly brought to rest...
- Q A rod of length 20 cm is made of metal It expands by 0 075cm when its temperature is raised from 0 C to 100 C Amother rod of a...
- Q The thermal conductivity of brick is 1 7 W m K and that of cement is 2 9 W m K What thickness of cement will have same insulation as...
- Q 3 7 x 10 J 4 A diatomic ideal gas is used in a Carnot engine as the working substance If during the adiabatic expansion part of t cycle the...
- Q Four metalic conductors having different shape Sphere cylinder pear lighting conductor an mounted on insulating stands and charged TH one which is best suited to retain the charges fo a...
- Q A glass cylinder contains mo 100 g of mercury at a temperature of to 0 C When temperature becomes t 20 C the cylinder contains 99 7 g of mercury...
- Q Density of a substance at 0 Cis 10 6 g cc and at 100 C is 10 g cc Find the coefficient of linear expansion of solid a 0 0006...
- Q 3 A solid sphere of radius r made of a soft material of bulk modulus K is surrounded by a liquid in a cylindrical container A massless piston of area...
- Q TWO and 3h 2 are the V2 is 25 A constant force Fo is applied on a uniform elastic string placed over a smooth horizontal surface as shown in figure...
- Q At some temperature T a bronze pin is a little large to fit into a hole drilled in a steel block The change in temperature required for an exact fit...
- Q Three uniform rods of lengths l 2l and 3l masses m 2 m and 3 m and coefficient of linear expansion a 2a and 3a are placed in contact on...
- Q l Question 12 A system of rods is assembled such that each rod has a length and cross sectional area S The mode of heat transfer is conduction and the...
- Q Two conductors A and Beach of cross section area 5 cm are connected in series Variation of temperature in C along the length in cm is as shown in the...
- Q Question 21 A gaseous mixture initially at 300 K and 2 x 105 N m pressure contains 6 gm of H and 8 gm of He The mixture is expanded...
- Q OPPER An iron bar 10cm in length is kept at 20 C If the coefficient of linear expansion of iron is a 11x10 C then at 19 C it will...
- Q Following figure shows on adiabatic cylindrical container of volume Vo divided by an adiabatic smooth piston area of cross section A in two equal parts An ideal gas Cp Cy...
- Q A cylindrical container of radius R and height h is completely filled with a liquid Two horizontal L shaped pipes of small cross section area a are connected to the...
- Q A cable that can support a load W is cut into two equal parts The maximum load that can be supported by either part is Question Type Single Correct Type...
- Q A simple seconds pendulum is constructed out of a very thin string of thermal coefficient of linear expansion a 20 10 4 C and a heavy particle attached to one...
- Q A balloon is filled with helium at the atmospheric pressure Po The volume of spherical balloon is Vo Afte Po being released the balloon burst at an altitude where the...
- Q Q17 A composite bar of 20mm x 20mm cross section is made up of three flat bars as shown in figure All the three bars are rigidly connected at the...
- Q A non isotropic solid metal cube has coefficients of linear expansion as 5 x 10 5 C along the x axis and 5 x 10 6 C along the y...
- Q An aluminium measuring rod which is correct at 5 C measures the length of a line as 80 cm at 45 C If thermal coefficient of linear expansion of aluminium...
- Q A block of weight 100 N is suspended by copper and steel wires of same cross sectional area 0 5 and length 3 m and 1 m respectively Their other...
- Q 8 A steel rod of length 1 m is heated from 25 to 75 C keeping its length constant The longitudinal strain developed in the rod is Given coefficient of...
- Q Example 20 3 A steel ruler exactly 20 cm long is graduated to give correct measurements at 20 C a Will it give readings that are too long or too...
- Q Temperature of nitrogen in a vessel of volume 2 m is 288 K A U tube manometer connected to the vessel shows a reading of 70 cm of mercury level...
- Q 9 The coefficient of linear expansion of steel and brass are 11 x 10 6 C and 19x106 C respectively If their difference in lengths at all temperatures has to...
- Q A furnace wall consists of 100 mm thick refractory brick and 800 mm thick insulating fire brick separated by an air gap The outside wall is covered with a 20mm...
- Q Forces of 100 N each are applied in opposite directions on the upper and lower faces of a cube of side 20 cm The upper face is shifted parallel to...
- Q If a bar is made of copper whose coefficient of linear expansion is one and a half times that of iron the ratio of the force developed in the copper...
- Q A thermally insulated piece of metal is heated under atmospheric pressure by an electric current so that it receives electric energy at constant power P This leads to an increase...
- Q A wall made up of two layer X and Y The thickness of the two layers is the same but materials are different The thermal conductivity of X is thrice...
- Q A monoatomic ideal gas initially at temperature T is enclosed in a cylinder fitted with a frictionless piston The gas is allowed to expand adiabatically to a temperature T by...
- Q 13 A solid uniform metal bar of diameter Dand length Lis hanging vertically from its upper end The elongation of the bar due to self weight is a Proportional to...
- Q 10 A A steel scale is to be prepared such that the millimeter intervals are to be accurate within 6x10 mm The maximum temperature variation from the temperature of calibration...
- Q 34 A U tube is filled with mercury Hg The two limbs are maintained at 0 C and 100 C and the heights of the two columns are 100 cm...
- Q 3 0 6 x 10 5 C 4 0 75 x 10 5 C 17 Coefficient of linear expansion of a vessel completely filled with Hg is 1 x 10...
- Q An anisotropic material has coefficients of linear thermal expansion a2 and a3 along x y and z axis respectively Coefficient of cubical expansion of its material will be equal to...
- Q A clock that keeps correct time at 20 C is subjected to 40 C If coefficient of linear expansion of the pendulum is 12x10 C how much time will gain...
- Q 5 Three rods formed an equilateral triangle ABC at 0 C Rods AB and AC have same coefficient of expansion a and rod BC has a If temperature of the...
- Q Inner surface of a cylindrical shell of length and of material of thermal conductivity k is kept at constant temperature T and the outer surface of the cylinder is kept...
- Q 2 The apparent coefficient of expansion of a liquid when heated in copper vessel is C and when heated in silver vessel S If A is the coefficient of linear...
- Q the ratio of lengths radii and Young s modulus of steel and brass wires in the figure are a b and c respectively then the corresponding ratio of increase in...
- Q 82 An ideal monoatomic gas is carried around the cycle ABCDA as shown in the figure The efficiency of the cycle is C C C 3Po Po B A Vo...
- Q 16 Two uniform rods AB and BC have Young s modulii 1 2 x 10 1 N m and 1 5 x 10 1 N m respectively If coefficient of...
- Q 31 Three rods of same dimensions have thermal conductivities 3K 2K and K They are arranged as shown with their ends at 100 C 50 C and 0 C The...
- Q 8 Two conducting rods are joined in series as shown in the diagram Their conductivity are K and 2K Their length are in the ratio 2L and L respectively If...
- Q Two identical rods of silver and copper are coated with wax One end of each is put in a hot reservoir and other end is kept at room temperature Ratio...
- Q The apparent coefficient of expansion of a liquid when heated in a copper vessel is C and when heated in a silver vessel it is S If A is the...
- Q 1 54 Three rods of equal length are joined to form an equilateral triangle PQR O is the mid point of PQ Distance OR remains same for small change in...
- Q A steel tape measures the length of a copper rod as 90 0 cm when both are at 10 C the calibration temperature for the tape What would the tape...
- Q 24 Density of a substance at 0 C is 10 6 gm c c and at 100 C is 10 gm c c coefficient of linear expansion of solid is...
- Q A planar lamina is made of thin unifor The length of section AB and EF is L and its coefficient is a The length of CD is L and its...
- Q x Two rods of material X sandwich another rod as shown in figure 1 19 At temperature T the three rods are in a state of zero strain and of...
- Q Consider two rods of same length and different specific heats S1 S conductivities K K and area of cross sections A1 A2 and both having temperature T and T2 at...
- Q The lengths of an iron and a zinc rod at 0 C are 25 55 cm and 25 5 cm respectively At what temperature will their lengths be equal Coefficients...
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