Physics question and answers for March 04, 2024
- Q Water of mass 100g at a temperature of 100 C is converted into steam at 100 C The specific latent heat of vaporisation of water is 2300 J g How...
- Q Calculate the all possible View factor of cylinder body assume top and bottom surface as 1 and 2 and inside cylinder is 3rd body Take diameter D and length L...
- Q Two black spheres P and Q have radii in the ratio 3 2 The wavelengths of maximum intensity radiation are in the ratio 3 4 respectively The ratio of radiated...
- Q TYPE questions Each question has 4 choices 1 Read More How much heat must be supplied to convert 1 kg ice at 10 C to steam at 100 C Take...
- Q When a hot object is placed in a water bath whose temperature is 25 C it cools from 100 C to 50 C in 160s In another bath the same...
- Q A perfectly conducting pan at 0 C is put on a gas stove at t 0 Stove supplies a constant power P Let be the temperature of the pan at...
- Q A closed bottle containing water is opened the moon What will happen A The water will freeze B The water will boil C The water will remain as before stor...
- Q 4 1 1 Two spheres A and B have the same radii but the heat capacity of A is greater than that of B The surfaces of both are painted...
- Q To sterilize a 49 0 g glass baby bottle we must raise its temperature from 21 0 C to 87 0 C How much heat transfer in J is required
- Q On a hypothetical scale X the ice point is 40 and the steam point is 120 For another scale Y the ice point and steam points are 30 and 130...
- Q 500 g of water and 100 g of ice at 0 C are in a calorimeter whose water equivalent is 40 g 10 g of steam at 100 C is...
- Q ALLEN An ideal heat engine exhausting heat at 77 C 8 is to have a 30 efficiency It must take heat at 1 127 C 3 327 C 2 227...
- Q 1 4 4 2 10 gm of ice at 5 C is added to 10 gm of water 45 at 60 C Specific heat of water 1 cal gm C...
- Q 5 Two spherical black bodies made of san material and with the same surface finish hat masses M and M and are at temperatur T and T If they are...
- Q H One end of a rod is maintained at a fixed temperature Tu while the other end is attached to a container having water of mass m at temperature T...
- Q 14 Assertion The division are equally marked on the scale of AC ammeter Reason Heat produced is directly proportion to current 1 Point OOC if both Assertion and Reason are...
- Q 39 The temperature of a body falls from 62 C to 39 50 C in 10 minutes If the temperature of the surroudings is 26 C the temperature in next...
- Q I Molten magnesium is the most efficient and commonly used coolant in the nuclear reactor II Shut down position and critical stage occur during the operation of nuclear reactor SolveLancer...
- Q An open container holds ice of mass 0 505 kg at a temperature of 16 2 C The mass of the container can be ignored Heat is supplied to the...
- Q You are boiling pasta and absentmindedly grab a copper stirring spoon rather than your wooden spoon The copper spoon has a 25 mm x 1 2 mm rectangular cross section...
- Q An object with initial temperature 150 C is placed outside where the temperature is 35 C Its temperatures at 12 15 and 12 20 are 120 C and 90 C...
- Q A wire 3 00 m long and 0 450 mm in cross sectional area has a resistance of 38 3 at 20 0 C If its resistance increases to 38...
- Q Q2 25 July 2021 Shift 1 mathongo mathongo mathongo mathongo mathongo Two different metal bodies A and B of equal mass are heated at a uniform rate under similar mathongo...
- Q 3 2 n 1 p p 21 The efficiency of an ideal heat engine working Q 121 between the freezing point and boiling point of water is 1 26 8...
- Q 5 The power radiated by a black body is P and it radiates maximum energy at wavelength If the temperature of the black body is now changed so that it...
- Q 39 Two bottles A and B have radii R and R and B A B B A B heights h and h respectively with R 2R and h 2h These...
- Q One end of a thermally insulated rod is kept at a temperature T and the other at T The rod is composed of two sections of lengths and thermal conductivities...
- Q 70 Three copper blocks of masses M M and M3 kg respectively are brought into thermal contact till they reach equilibrium Before contact they were at temperatures T T and...
- Q Here is given work done on the gas means positive wor k W 8J not 8J but when put 8J then answer is com e otherwise not why sir ma...
- Q A thermally insulated vessel is divided into two parts by a heat insulating massless piston which cann in the vessel without friction The left part of vessel contains 1 mole...
- Q A compound bar 2 0 m long is constructed of a solid steel core 1 0 cm in diameter surrounded by a copper casing whose outside diameter is 2 0...
- Q s of um rth S 1 6 A rubber of volume 2000 cc is alternately subjected to tension and released The figure shows the stress strain curve of rubber Each...
- Q Six solid rods of equal length I and area section A are connected as shown Out of six rods three are made up of material x and other three of...
- Q 24 70 cal 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...
- Q neet prep 18 Two bodies A and B have thermal emissivities of and 0 81 respectively The outer surface areas of the bodies are the same The two bodies emit...
- Q FL0023 24 Two wires of the same length and material but different radii r and r are suspended from a rigid support both carry the same load at the lower...
- Q 1 8 A metal plate 4 mm thick has a temperature difference of 32 C between its faces It transmits 200 kcal h through an area of 5 cm Thermal...
- Q 1 61A Find various orders of Bragg s b Carbon is allowed to diffuse through a steel plate 10 mm thick The concentrations of carbon at the two faces are...
- Q Two rods of same material have same length and area The heat AQ flows through them for 12 minutes when they are jointed in series If now both the rods...
- Q 30 Four identical rods of same material have been joined to make it a X shape structure If their ends are maintained at temperatures as shown in the figure then...
- Q 18 A tungsten lamp at a temperature of 3000 K has surface area of 0 3 cm If the lamp has emissivity of 0 4 the rate of heat radiated...
- Q 2 4 55 W 1 40 W 3 90 W 9 The amount of radiations emitted by a perfectly black body is proportional to NCERT Pg 295 1 Temperature on...
- Q 5 An object kept in a large room having air temperature of 25 C takes 12 minutes to cool from 80 C to 70 C The time taken to cool...
- Q Two different metal bodies A and B of equal mass are heated at a uniform rate under similar conditions The variation of temperature of the bodies is graphically represented as...
- Q A thermodynamic system is taken from original state to another intermediate state by linear process shown in diagram Its volume is then reduced to original volume from B to C...
- Q n 35 A cylindrical conductor is connected across a battery and when a steady state is reached temperature of the conductor exceeds the ambient temperature by A0 16 C If...
- Q A uniform wooden plank cuboid is floating on water is tied to the bottom of the pool such that in static equilibrium the diagonal plane of symmetry of its vertical...
- Q A body cools from 5T to 2T in 5 minutes The room temperature is T Assume that newton s law of cooling is applicable The temperature of the body at...
- Q A circular conducting coil of radius 1 m is being heated by the change of magnetic field B passing perpendicular to the plane in which the coil is laid The...
- Q A steel measuring tape and a copper rod are a heir true length at room temperature Their therma coefficient of linear expansion are a and a respectively However measurement of...
- Q The temperature of the two outer surfaces of a 15 composite slab consising of two materials having coefficients of thermal conductivity K and 2K and thickness x and 4x respectively...
- Q Consider two insulating sheets with thermal resistances R and R as shown The temperature 0 is R 1 3 0 0 0 R R R1 R2 01 0 01 02...
- Q black rectangular surface of area A emits energy E per second at 27 C If length and breadt rd of initial value and temperature is raised to 327 C then...
- Q rdinary bodies A and B radiate maximum energy with wavelength difference 4 m The Osolute temperature of body A is 3 times that of B The diates maximum energy is...
- Q Q 14 Let us assume that sun radiates like a black body with surface temperature at T 6000 K and earth absorbs S radiations coming from sun only If both...
- Q 3 A steel tape is calibrated at 25 C On a cold day when the temperature is 0 C then the percentage error in the tape is Given a for...
- Q 200 gram ice at 20 C is mixed with 100 gram water at 60 C If specific heat of ice is 0 5 calorie gram K and that of water...
- Q About black body radiation which one of the following is WRONG statement A For all wavelengths intensity is same B All wavelengths are emitted by a black body C For...
- Q Two spherical black bodies made of same material and wi th the same surface finish have masses M1 and M2 and are at temperatures T1 and T2 If they are...
- Q 2 Two rods of electrical conductivities K and K ar connected as shown in the figure Find the equivalent electrical conductivity of the system A 3 OI RIK K 2R...
- Q Rate of radiation by a black body is R at temperature T Another body has same area but emissivity is 0 2 and temperature 3T Its rate of radiation is...
- Q A closed cubical box is made of perfectly insulating material The only way for the heat to enter or leave is through two solid cylindrical plugs each of cross sectional...
- Q Two identical objects A and B emissivity e and e are placed in an enclosure Temperature of body A B and enclosure are same and constant Heat emitted by body...
- Q Q14 Two liquids A and B are at 32 C and 24 C When mixed in equal masses the temperature of the mixture is found to be 28 C Their...
- Q A refrigerator works between 4 C and 30 C It is required to remove 600 calories of heat every second in order to keep the temperature of the refrigerated space...
- Q 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 energy consumed...
- Q Knowledge Sections Q No 9 It is desirable to handle the slip gauges with a cloth or chamois leather in order to A Avoid injury to hands B Protect the...
- Q Two identical objects A and B are at initial temperatures TA and TB TA TB respectively The specific heat capacity of the material of these objects increases with temperature If...
- Q View In English Two metallic spheres S and 52 are made of the same material and have identical surface finish The mass of St is three times that of S...
- Q 2 14 gm of nitrogen gas at constant pressure has temperature of 300 K How much heat energy would be required to change its temperature to 350 K at same...
- Q The temperature of a well stirred liquid kept open to a cold surrounding is plotted against time The value of sec 0 is Temperature C 50 45 40 35 30...
- Q Two plates of equal areas are placed in contact with each other Their thickness are 2 0 cm and 5 0 cm respectively The temperature of the external surface of...
- Q 6 Three copper blocks of masses M M and M kg respectively are brought into thermal contact till they reach equilibrium Before contact they were at T T T T...
- Q 12 A glass full of hot milk is poured on the table It begins to cool gradually Which of the following is correct a The rate of cooling is constant...
- Q Two rods with the same dimensions have thermal conductivities in the ratio 1 2 They are arranged between heat reservoirs with the same temperature difference in two different configurations A...
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