THERMAL PHYSICS QUIZ-8

THERMAL PHYSICS QUIZ-8

Dear Readers,

As per analysis for previous years, it has been observed that students preparing for NEET find Physics out of all the sections to be complex to handle and the majority of them are not able to comprehend the reason behind it. This problem arises especially because these aspirants appearing for the examination are more inclined to have a keen interest in Biology due to their medical background. 

Furthermore, sections such as Physics are dominantly based on theories, laws, numerical in comparison to a section of Biology which is more of fact-based, life sciences, and includes substantial explanations. By using the table given below, you easily and directly access to the topics and respective links of MCQs. Moreover, to make learning smooth and efficient, all the questions come with their supportive solutions to make utilization of time even more productive. Students will be covered for all their studies as the topics are available from basics to even the most advanced. 

Q1. For cooking the food,which of the following type of utensil is most suitable

•  High specific heat and low conductivity
•  High specific heat and high conductivity
•  Low specific heat and low conductivity
•  Low specific heat and high conductivity

Solution

Q2.Two spheres P and Q of same colour having radii 8 cm and 2 cm are maintained at temperatures 127℃ and 527℃ respectively.The energy radiated by P and Q is

•  0.054
•  0.0034
•  1
•  2

Solution

Q3.  A solid material is supplied with heat at constant rate and the temperature of the material changes as shown.From the graph,the false conclusion drawn is

•   AB and CD of the graph represent phas changes
•  AB represents the change of state from solid to liquid
•  Latent heat of fusion is twice the latent heat of vaporization
•  CD represents change of state from liquid to vapour

Solution

Q4. Four identical rods of same material are joined end to end to form a square. If the temperature difference between the ends of a diagonal is 100℃, then the temperature difference between the ends of other diagonal will be

•  0℃
•  100l℃; where l is the length of each rod
•  1002l℃
•  100℃

Solution

 

Q5.Suppose the sun expands so that its radius becomes 100 times its present radius and its surface temperature becomes half of its present value. The total energy emitted by it then will increase by a factor of

•  104
•  625
•  256
•  16

Solution
  

Q6. Two identical plates of different metals are joined to form a single plate whose thickness is double the thickness of each plate. If the coefficients of conductivity of each plate are 2 and 3 respectively, then the conductivity of composite plate will be

•  5
•  2.4
•  1.5
•  1.2

Solution

Q7.Liquid oxygen at 50 K is heated to 300 K at constant pressure of 1 atm. The rate of heating is constant. Which of the following graphs represents the variations of temperature with time?

•  
  
  
  
•  
  
  
  
•  
  
  
  
•  
  
  
  

Solution

Q8.A faulty thermometer has its lower fixed point marked as -10℃ and upper fixed point marked as 110o. If the temperature of the body shown in this scale is 62o, the temperature shown on the Celsius scale is

•  72℃
•  82℃
•  60℃
•  42℃

Solution

Q9.Two thermometers are used to record the temperature of a room.If the bulb of one is wrapped in wet hanky

•  The temperature recorded by both will be same
•  The temperature recorded by wet-bulb thermometer will be greater than that recorded by the other
•  The temperature recorded by dry-bulb thermometer will be greater than that recorded by the other
•  None of the above

Solution

Q10. The temperature of the two outer surfaces of a composite slab, consisting of two materials having coefficients of thermal conductivity K and 2K and thickness x and 4x, respectively are T2 and T1 (T2>T1). The rate of heat transfer through the slab, in a steady state is AT2-T1Kxf, with f equals to

•  1
•  1/3
•  2/3
•  1/3

Solution