Related InterviewSolutions

• A platinum resistancethermometer reads `0^0`at the ice point and boiling point of water respectively. The resistance of a platnum wire varies with Celsius temperature `theta` as `R_t = R_0 (1+alphatheta + betatheta^2)`, where `alpha = 3.8 xx 10^(-3) ^0 C^(-1)` and `beta= -5.6 xx 10^(-7) ^0 C^(-2)`. What will be the reading of this thermometer if it is pleaced in a liquid bath maintained at `50^0 C`?
• The pressure of the gas in a constant volume gas thermometer is 80cm of mercury in melting ice at `1 atm`. When the bulb is placed in a liquid, the pressure becomes `160cm` of mercury. Find the temperature of the liquid.
• In a constant volume gas thermometer, the pressure of the working gas is measured by the differenced in the levels of mercury in the two arms of a U-tube connected to the gas at one end. When the bulb is placed at the room temperature `27.0^0 C`, the mercury column in the arm open to atmosphere stands `5.00 cm` above the level of mercury in the other arm. When the bulb is placed in a hot liquid, the difference of mercury levels becomes `45..0 Cm`. Calculate the temperature of the liquid. (Atmospheric pressure `= 75.0cm` of mercury).
• A resistance thermometer reads `R=20.0Omega, 27.5 Omega, and 50.0 Omega` at the point `(0^C)`, the steam point `(100^C)` and the zinc point `(420^C)` respectively.Assuming that the resistance varies with temperature as `R_Theta=(1+alphaTheta+betaTheta^2)` , find the values of `R_0`, alpha and beta. Here Theta represents the temperature on Celsius scale.
• A concrete slab has a length of 10 m on a winter night when the temperature is `0^C`. Find the lenth of the slab on a summer day when the temperature is `35^C`. The coefficient of linear expansion of concrete is `1.0 XX 10^(-5) 0^ C^(-1)`.
• The pressue of air in the bulb of a constant volume gas thermometer of `0^0 C` and `100^0 C` are `73.00cm and 100cm` of mercury respectively.Calculate the pressure at the room temperature `20^0 C`.