JEE Main & Advanced Physics Thermometry, Calorimetry & Thermal Expansion Question Bank

done Thermal Expansion Total Questions - 34

• question_answer1)
  When a copper ball is heated, the largest percentage increase will occur in its                                     [EAMCET 1992]
  A)
             Diameter                                done clear
  B)
             Area done clear
  C)
             Volume                                   done clear
  D)
             Density done clear
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• question_answer2)
  A vertical column 50 cm long at 50°C balances another column of same liquid 60 cm long at 100°C. The coefficient of absolute expansion of the liquid is                     [EAMCET 1990]
  A)
             0.005/°C                                  done clear
  B)
             0.0005/°C done clear
  C)
             0.002/°C                                  done clear
  D)
             0.0002/°C done clear
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• question_answer3)
  The apparent coefficient of expansion of a liquid when heated in a copper vessel  is C and when heated in a silver vessel is S. If A is the linear coefficient of expansion of copper, then the linear coefficient of expansion of silver is [EAMCET 1991]
  A)
             \[\frac{C+S-3A}{3}\]          done clear
  B)
             \[\frac{C+3A-S}{3}\] done clear
  C)
             \[\frac{S+3A-C}{3}\]          done clear
  D)
             \[\frac{C+S+3A}{3}\] done clear
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• question_answer4)
  A uniform metal rod is used as a bar pendulum. If the room temperature rises by 10°C, and the coefficient of linear expansion of the metal of the rod is 2 ´ 10?6 per °C, the period of the pendulum will have percentage increase of  [NSEP 1992]
  A)
             ? 2 ´ 10?3                                done clear
  B)
             ? 1 ´ 10?3 done clear
  C)
             2 ´ 10?3                                    done clear
  D)
             1 ´ 10?3 done clear
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• question_answer5)
  A bar of iron is 10 cm at 20°C. At 19°C it will be (a of iron = 11 ´ 10?6/°C)                                  [EAMCET 1997]
  A)
             11 ´ 10?6 cm longer             done clear
  B)
             11 ´ 10?6 cm shorter done clear
  C)
             11 ´ 10?5 cm shorter           done clear
  D)
             11 ´ 10?5 cm longer done clear
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• question_answer6)
  When a rod is heated but prevented from expanding, the stress developed is independent of [EAMCET 1997]
  A)
             Material of the rod             done clear
  B)
             Rise in temperature done clear
  C)
             Length of rod                        done clear
  D)
             None of above done clear
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• question_answer7)
  Expansion during heating                                    [CBSE PMT 1994]
  A)
             Occurs only in solids done clear
  B)
             Increases the weight of a material done clear
  C)
             Decreases the density of a material done clear
  D)
             Occurs at the same rate for all liquids and solids done clear
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• question_answer8)
  On heating a liquid of coefficient of cubical expansion g in a container having coefficient of linear expansion g / 3, the level of liquid in the container will                      [EAMCET 1993]
  A)
             Rise done clear
  B)
             Fall done clear
  C)
             Will remain almost stationary done clear
  D)
             It is difficult to say done clear
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• question_answer9)
  A pendulum clock keeps correct time at 0°C. Its mean coefficient of linear expansions is \[\alpha /{}^\circ C\], then the loss in seconds per day by the clock if the temperature rises by t°C is                                                      [AFMC 1993]
  A)
             \[\frac{\frac{1}{2}\alpha \,t\times 864000}{1-\frac{\alpha \,t}{2}}\]               done clear
  B)
             \[\frac{1}{2}\alpha \,t\times \,86400\] done clear
  C)
             \[\frac{\frac{1}{2}\alpha \,t\times 86400}{{{\left( 1-\,\frac{\alpha \,t}{2} \right)}^{2}}}\]     done clear
  D)
             \[\frac{\frac{1}{2}\alpha \,t\times 86400}{1+\frac{\alpha \,t}{2}}\] done clear
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• question_answer10)
  When a bimetallic strip is heated, it                [CBSE PMT 1990]
  A)
             Does not bend at all done clear
  B)
             Gets twisted in the form of an helix done clear
  C)
             Bend in the form of an arc with the more expandable metal outside done clear
  D)
             Bends in the form of an arc with the more expandable metal inside done clear
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• question_answer11)
  A solid ball of metal has a concentric spherical cavity within it. If the ball is heated, the volume of the cavity will [AFMC 1997; Orissa PMT 2004]
  A)
             Increase                                  done clear
  B)
             Decrease done clear
  C)
             Remain unaffected            done clear
  D)
             None of these done clear
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• question_answer12)
  A litre of alcohol weighs                                             [AFMC 1994]
  A)
             Less in winter than in summer done clear
  B)
             Less in summer than in winter done clear
  C)
             Some both in summer and winter done clear
  D)
             None of the above done clear
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• question_answer13)
  5 litre of benzene weighs                                            [MNR 1996]
  A)
             More in summer than in winter done clear
  B)
             More in winter than in summer done clear
  C)
             Equal in winter and summer done clear
  D)
             None of the above done clear
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• question_answer14)
  Water has maximum density at                          [Pb. PMT 1997]
  A)
             0°C                                            done clear
  B)
             32°F done clear
  C)
             ? 4°C                                         done clear
  D)
             4°C done clear
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• question_answer15)
  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 is minimum when [SCRA 1998]
  A)
             Only the block is heated done clear
  B)
             Both block and pin are heated together done clear
  C)
             Both block and pin are cooled together done clear
  D)
             Only the pin is cooled done clear
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• question_answer16)
  If the length of a cylinder on heating increases by 2%, the area of its base will increase by             [CPMT 1993; BHU 1997]
  A)
             0.5%                                         done clear
  B)
             2% done clear
  C)
             1%  done clear
  D)
             4% done clear
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• question_answer17)
  The volume of a gas at 20°C is 100 cm3 at normal pressure. If it is heated to 100°C, its volume becomes 125 cm3 at the same pressure, then volume coefficient of the gas at normal pressure is                               [Pb. PET 2002; DPMT 2001]
  A)
             0.0015/°C                                done clear
  B)
             0.0045/°C done clear
  C)
             0.0025/°C                                done clear
  D)
             0.0033/°C done clear
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• question_answer18)
  The coefficient of superficial expansion of a solid is 2 ´ 10?5 /°C. It's coefficient of linear expansion is        [KCET 1999]
  A)
             4 ´ 10?5/°C                              done clear
  B)
             3 ´ 10?5/°C done clear
  C)
             2 ´ 10?5/°C                              done clear
  D)
             1 ´ 10?5/°C done clear
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• question_answer19)
  Density of substance at 0°C is 10 gm/cc and at 100°C, its density is 9.7 gm/cc. The coefficient of linear expansion of the substance will be                                    [BHU 1996; Pb. PMT 1999; DPMT 1998, 2003]
  A)
             102 done clear
  B)
             10?2 done clear
  C)
             10?3                                           done clear
  D)
             10?4 done clear
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• question_answer20)
  Coefficient of real expansion of mercury is 0.18 ´ 10?3/°C. If the density of mercury at 0°C is 13.6 gm/cc. its density at 473K is                                                        [DPMT 1996]
  A)
             13.11 gm/cc                           done clear
  B)
             26.22 gm/cc done clear
  C)
             52.11 gm/cc                           done clear
  D)
             None of these done clear
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• question_answer21)
  The real coefficient of volume expansion of glycerine is 0.000597 per°C and linear coefficient of expansion of glass is 0.000009 per°C. Then the apparent volume coefficient of expansion of glycerine is                                           [AIIMS 2000]
  A)
             0.000558 per°C                     done clear
  B)
             0.00057 per°C done clear
  C)
  0.00027 per°C                                   done clear
  D)
  0.00066 per°C done clear
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• question_answer22)
  A beaker is completely filled with water at 4°C. It will overflow if               [EAMCET 1992; BHU 1994; AFMC 2005]
  A)
             Heated above 4°C done clear
  B)
             Cooled below 4°C done clear
  C)
             Both heated and cooled above and below 4°C respectively done clear
  D)
  None of the above done clear
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• question_answer23)
  The volume of a metal sphere increases by 0.24% when its temperature is raised by 40°C. The coefficient of linear expansion of the metal is ..........  °C             [Kerala PMT 2005]
  A)
             2 ´ 10?5                                    done clear
  B)
             6 ´ 10?5 done clear
  C)
             2.1 ´ 10?5                                done clear
  D)
             1.2 ´ 10?5 done clear
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• question_answer24)
  Ratio among linear expansion coefficient (a), areal expansion coefficient (b) and volume expansion coefficient (g) is                                                                       [RPMT 2000]
  A)
             1 : 2 : 3                                     done clear
  B)
             3 : 2 : 1 done clear
  C)
             4 : 3 : 2                                     done clear
  D)
             None of these done clear
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• question_answer25)
  If on heating liquid through 80°C, the mass expelled is (1/100)th of mass still remaining, the coefficient of apparent expansion of liquid is                                                   [RPMT 2004]
  A)
  1.25 ´ 10?4/°C                                   done clear
  B)
  12.5 ´ 10?4/°C done clear
  C)
  1.25 ´ 10?5/°C                                   done clear
  D)
  None of these done clear
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• question_answer26)
  In cold countries, water pipes sometimes burst, because
  A)
  Pipe contracts done clear
  B)
  Water expands on freezing done clear
  C)
  When water freezes, pressure increases done clear
  D)
  When water freezes, it takes heat from pipes done clear
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• question_answer27)
  A cylindrical metal rod of length L0 is shaped into a ring with a small gap as shown. On heating the system
  A)
             x decreases, r and d increase done clear
  B)
             x and r increase, d decreases done clear
  C)
             x, r and d all increase done clear
  D)
             Data insufficient to arrive at a conclusion done clear
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• question_answer28)
  The length of a metallic rod is 5m at 0°C and becomes 5.01 m, on heating upto 100°C. The linear expansion of the metal will be                                                         [UPSEAT 1999]
  A)
             2.33 ´ 10?5 /°C                       done clear
  B)
             6.0 ´ 10?5 /°C done clear
  C)
             4.0 ´ 10?5 /°C                         done clear
  D)
             2.0 ´ 10?5 /°C done clear
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• question_answer29)
  A metal rod of silver at 0°C is heated to 100°C. It's length is increased by 0.19 cm. Coefficient of cubical expansion of the silver rod is                                                            [UPSEAT 2001]
  A)
             5.7 ´ 10?5/°C                          done clear
  B)
             0.63 ´ 10?5/°C done clear
  C)
             1.9 ´ 10?5/°C                          done clear
  D)
             16.1 ´ 10?5/°C done clear
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• question_answer30)
  A brass disc fits simply in a hole of a steel plate. The disc from the hole can be loosened if the system [UPSEAT 2001]
  A)
             First heated then cooled done clear
  B)
             First cooled then heated done clear
  C)
             Is heated                                done clear
  D)
             Is cooled done clear
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• question_answer31)
  An iron bar of length 10 m is heated from 0°C to 100°C. If the coefficient of linear thermal expansion of iron is 10 ´ 10?6 /°C, the increase in the length of bar is                                                [UPSEAT 2005]
  A)
             0.5 cm                                      done clear
  B)
             1.0 cm done clear
  C)
             1.5 cm                                      done clear
  D)
             2.0 cm done clear
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• question_answer32)
  If a cylinder of diameter 1.0 cm at 30°C is to be solid into a hole of diameter 0.9997 cm in a steel plate at the same temperature, then minimum required rise in the temperature of the plate is : (Coefficient of linear expansion of steel \[=12\times {{10}^{-6}}/{}^\circ C\])                                                                        [EAMCET 2001]
  A)
             25°C                                          done clear
  B)
             35°C done clear
  C)
             45°C                                          done clear
  D)
             55°C done clear
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• question_answer33)
  Surface of the lake is at 2°C. Find the temperature of the bottom of the lake                                       [Orissa JEE 2002]
  A)
             2°C                                            done clear
  B)
             3°C done clear
  C)
             4°C                                            done clear
  D)
             1°C done clear
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• question_answer34)
  Two rods, one of aluminum and the other made of steel, having initial length \[{{l}_{1}}\] and \[{{l}_{2}}\] are connected together to form a single rod of length \[{{l}_{1}}+{{l}_{2}}\]. The coefficients of linear expansion for aluminum and steel are \[{{\alpha }_{a}}\] and \[{{\alpha }_{s}}\] respectively. If the length of each rod increases by the same amount when their temperature are raised by \[{{t}^{o}}C\], then find the ratio \[\frac{{{l}_{1}}}{({{l}_{1}}+{{l}_{2}})}\]                                                  [IIT-JEE (Screening) 2003]
  A)
  \[\frac{{{\alpha }_{s}}}{{{\alpha }_{a}}}\]                                 done clear
  B)
             \[\frac{{{\alpha }_{a}}}{{{\alpha }_{s}}}\] done clear
  C)
             \[\frac{{{\alpha }_{s}}}{({{\alpha }_{a}}+{{\alpha }_{s}})}\] done clear
  D)
             \[\frac{{{\alpha }_{a}}}{({{\alpha }_{a}}+{{\alpha }_{s}})}\] done clear
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