KVPY Stream SBSX (Class 12 & 1st Year BSC) Physics: Questions 90  92 of 268
Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 268 questions. Access all new questions we will add tracking exampattern and syllabus changes. View Sample Explanation or View Features.
Rs. 200.00 or
Question number: 90
» Thermodynamics » Measurement of Temperature
Appeared in Year: 2014
Question
Consider two thermometers T_{1} and T_{2} of equal length which can be used to measure temperature over the range θ_{1} to θ_{2}. T_{1} contains mercury as the thermometric liquid while T_{2} contains bromine. The volumes of the two liquids are the same at the temperature θ_{1}. The volumetric coefficients of expansion of mercury and bromine are 18 × 10^{–5} K^{–1} and 108 × 10^{–5} K^{–1}, respectively. The increase in length of each liquid is the same for the same increase in temperature. If the diameters of the capillary tubes of the two thermometers are d_{1} and d_{2} respectively, then the ratio d_{1}: d_{2} would be closest to –
Choices
Choice (4)  Response  

a.  0.4 

b.  2.5 

c.  6.0 

d.  0.6 

Question number: 91
» Thermodynamics » Thermal Equilibrium
Appeared in Year: 2014
Question
An ideal gas follows a process described by from (P_{1}, V_{1}, T_{1}) to (P_{2}, V_{2}, T_{2}) (C is a constant). Then –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 92
» Properties of Solids & Liquids » Surface Energy and Surface Tension
Appeared in Year: 2013
Question
YoungLaplace law states that the excess pressure inside a soap bubble of radius R is given by where σ is the coefficient of surface tension of the soap. The Eӧtvӧs number E_{0} is a dimensionless number that is used to describe the shape of bubbles rising through a surrounding fluid. It is a combination of g (the acceleration due to gravity), ρ (the density of the surrounding fluid), σ and a characteristic length scale L which could be the radius of the bubble. A possible expression for E_{0} is –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

