KVPY StreamSA (Class 11) Physics: Questions 15  17 of 252
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Question number: 15
» Properties of Solids & Liquids » Specific Heat Capacity
Appeared in Year: 2010
Question
A new temperature scale uses X as a unit of temperature, where the numerical value of the temperature t _{x} in this scale is related to the absolute temperature T by t _{x} = 3T + 300. If the heat of a material using this unit is 1400 J kg ^{1} X ^{–1} its heat in the S. I. system of units is
Choices
Choice (4)  Response  

a.  466.7 J kg ^{–1} K ^{–1} 

b.  4200 J kg ^{1} K ^{–1} 

c.  1400 J kg ^{–1} K ^{–1} 

d.  impossible to determine from the information provided 

Question number: 16
» Thermodynamics » Thermal Equilibrium
Appeared in Year: 2011
Question
The following three objects (1) a metal tray, (2) a block of wood, and (3) a woolen cap are left in a closed room overnight. Next day the temperature of each is recorded as T _{1}, T _{2} and T _{3} respectively. The likely situation is.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 17
» Gravitation » Orbital Velocity of a Satellite
Appeared in Year: 2010
Question
A planet of mass m is moving around a star of mass M and radius R in a circular orbit of radius r. The star abruptly shrinks to half its radius without any loss of mass. What change will be there in the orbit of the planet?
Choices
Choice (4)  Response  

a.  The radius of the orbit will not change 

b.  The radius of the orbit will increase 

c.  The radius of the orbit will decrease 

d.  The planet will escape from the star 
