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A wire of length L0 is supplied heat to raise its temperature by T. if γ is the coefficient of volume expansion of the wire and Y is Young’s modulus of the wire then the energy density stored in the wire is
05
Sep
A wire of length L0 is supplied heat to raise its temperature by T. if γ is the coefficient of volume expansion of the wire and Y is Young’s modulus of the wire then the energy density stored in the wire is The absolute coefficient of expansion of a liquid is 7 times that the [...]
A clock with a metal pendulum beating seconds keeps correct time at 0∘C. If it loses 12.5 s a day at 25∘C, the coefficient of linear expansion of metal pendulum is
05
Sep
A clock with a metal pendulum beating seconds keeps correct time at 0∘C. If it loses 12.5 s a day at 25∘C, the coefficient of linear expansion of metal pendulum is A clock with a metal pendulum beating seconds keeps correct time at 0∘C. If it loses 12.5 s a day at 25∘C the coefficient [...]
A solid whose volume does not change with temperature floats in a liquid. For two different temperatures t1 and t2 of the liquid, fractions f1 and f2 of the volume of the solid remain submerged in the liquid. The coefficient of volume expansion of the liquid is equal to
05
Sep
A solid whose volume does not change with temperature floats in a liquid. For two different temperatures t1 and t2 of the liquid, fractions f1 and f2 of the volume of the solid remain submerged in the liquid. The coefficient of volume expansion of the liquid is equal to A solid whose volume [...]
An iron tyre is to be fitted onto a wooden wheel 1 m in diameter. The diameter of tyre is 6 mm smaller than that of the wheel. The tyre should be heated so that its temperature increases by a minimum of (the coefficient of volume expansion of iron is 3.6×10^−5 / degree C)
05
Sep
An iron tyre is to be fitted onto a wooden wheel 1 m in diameter. The diameter of tyre is 6 mm smaller than that of the wheel. The tyre should be heated so that its temperature increases by a minimum of (the coefficient of volume expansion of iron is 3.6×10^−5 / degree C) The [...]
The absolute coefficient of expansion of a liquid is 7 times that the volume coefficient of expansion of the vessel. Then the ratio of absolute and apparent expansion of the liquid is
05
Sep
The absolute coefficient of expansion of a liquid is 7 times that the volume coefficient of expansion of the vessel. Then the ratio of absolute and apparent expansion of the liquid is The absolute coefficient of expansion of a liquid is 7 times that the volume coefficient of expansion of the vessel. Then the ratio [...]
The following graph shows two isotherms for a fixed mass of an ideal gas. The ratio of r.m.s. a speed of the molecules at temperature T1 and T2 is:
05
Sep
The following graph shows two isotherms for a fixed mass of an ideal gas. The ratio of r.m.s. a speed of the molecules at temperature T1 and T2 is: The following graph shows two isotherms for a fixed mass of an ideal gas. The ratio of r.m.s. a speed of the molecules at temperature [...]
wo identical vessels A and B contain masses m and 2m of same gas. The gases in the vessels are heated keeping their volumes constant and equal. The temperature-pressure curve for mass 2m makes angle alpha with T-axis and that and for mass m makes an angle beta with T-axis then
05
Sep
wo identical vessels A and B contain masses m and 2m of same gas. The gases in the vessels are heated keeping their volumes constant and equal. The temperature-pressure curve for mass 2m makes angle alpha with T-axis and that and for mass m makes an angle beta with T-axis then The quantity PV/KT (k [...]
Helium gas is heated at constant pressure by 10 degree C. The percentage of heat energy supplied, which is used in increasing the internal energy of the gas is
05
Sep
Helium gas is heated at constant pressure by 10 degree C. The percentage of heat energy supplied, which is used in increasing the internal energy of the gas is Helium gas is heated at constant pressure by 10 degree C. The percentage of heat energy supplied which is used in increasing the internal energy of [...]
Three identical rods AB,CD and PQ are joined as shown. P and Q are mid points of AB and CD respectively. Ends A,B,C and D are maintained at 0^∘C, 100^∘C, 30^∘C and 60^∘C respectively. The direction of heat flow in PQ is :
05
Sep
Three identical rods AB,CD and PQ are joined as shown. P and Q are mid points of AB and CD respectively. Ends A,B,C and D are maintained at 0^∘C, 100^∘C, 30^∘C and 60^∘C respectively. The direction of heat flow in PQ is : 100^∘C 30^∘C and 60^∘C respectively. The direction of heat flow in PQ [...]
A monoatomic ideal gas is used in a carnot engine as the working substance. If during the adiabatic expansion the volume of the gas increases from (V)/(8) to V, the efficiency of the engine is
05
Sep
A monoatomic ideal gas is used in a carnot engine as the working substance. If during the adiabatic expansion the volume of the gas increases from (V)/(8) to V, the efficiency of the engine is A monoatomic ideal gas is used in a carnot engine as the working substance. If during the adiabatic expansion the [...]