Self Studies
Self Studies
Self Studies
Self Studies
Selfstudy
Selfstudy

Heat Test - 32

Result Self Studies

Heat Test - 32
  • Score

    -

    out of -
  • Rank

    -

    out of -
TIME Taken - -
Self Studies

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Self Studies Self Studies
Weekly Quiz Competition
  • Question 1
    1 / -0
    Glass cracks when heated; while a metal does not because
  • Question 2
    1 / -0
    Heat from the sun is received by the earth through
    Solution

  • Question 3
    1 / -0
    Thermal insulation is used to 
    Solution

  • Question 4
    1 / -0
    In which of the following process convection does not take place primarily?
    Solution

    $$\textbf{Explanation:}$$

    $$\bullet$$In convection, transfer of heat took place by movement of gaseous and liquid molecules.

    $$\bullet$$It generally happens in liquid and gas only where bulk portion is fluid. Sea and land breeze, trade wind and boiling water are example of such fluids. So, in those heat transfer is because of convection. But in bulb filament, resistance is responsible for transferring the heat which is example of conduction. So, in warming of glass bulb due to filament convection doesn’t take place.

    Hence, option D is the correct answer. 

  • Question 5
    1 / -0
    The Process of convection is faster than 
    Solution
    Convection is heat transfer by the macroscopic movement of mass. Convection can be natural or forced and generally transfers thermal energy faster than conduction.
  • Question 6
    1 / -0
    The thermal radiations are similar to
    Solution
    The thermal radiations are similar to $$\alpha$$-rays
    Hence, Option $$C$$ is correct answer.
  • Question 7
    1 / -0
    In which of the following processes, convection does not take place primarily?
    Solution
    Warming of glass of bulb is due to the radiation coming from hot filament of bulb not due to convection.
    The remaining three options A , B and C are results of convection.
    A
    The air above the land warms up and rises and the cool air over the sea moves in to take its place, resulting in the sea breeze in the daytime. At night, as the sea maintains its temperature better and is warmer than the land, the roles of land and sea reverse and convection of air results in the land breeze.
    B
     When boiling water, the temperature of molecules within the water increases and they slowly begin to move at a rapid rate, upwards. These molecules produce kinetic energy. The hot water molecules become less dense, and they rise above the denser cooler molecules. This movement of molecules creates convection currents. Boiling water is an example of forced convection.
    C
    A furnace is very hot from inside.The air from around the furnace gets heated and expands and rises above  and cooler air from surroundings take this place.And this processes goes on and on .Hence this is also a result of convection.
  • Question 8
    1 / -0

    In which of the following process, convection does not take place primarily?

    Solution
    Convection is the process of heat transfer in fluids by the actual motion of matter. Hence, a medium is required for convection process. As vacuum is created inside a bulb , hence heat transfer to glass bulb from filament is through radiation. 

    Hence, option C is correct.

  • Question 9
    1 / -0
    The energy from the sun reaches the earth by 
    Solution
    The process of the transfer of the heat from one place to another place without the need of a medium is called radiation. For example, the heat from the sun reaches the earth through radiation mode. 
    Since there is no medium in space , the heat energy from sun has to travel to earth without a medium which is a property of radiation.
  • Question 10
    1 / -0
    Two thermometers are constructed in the same way except that one has a spherical bulb and the other a cylindrical bulb; which one will respond quickly to temperature changes?
    Solution
    $$\textbf{Solution}:$$
    1. The flow of heat is proportional to the surface area or area of cross-section.
    2. We know that, the surface area of a cylindrical bulb is more than that of spherical surface. 
    3. Therefore, the thermometer with cylindrical bulb responds more quickly to temperature change than the thermometer with spherical bulb.

    $$\textbf{Hece A is the correct option}$$
Self Studies
User
Question Analysis

  • Correct -

  • Wrong -

  • Skipped -

My Perfomance
  • Score

    -

    out of -
  • Rank

    -

    out of -
Re-Attempt Weekly Quiz Competition
Self Studies Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Self Studies
Click on Allow to receive notifications
Allow Notification
Self Studies
Self Studies Self Studies
To enable notifications follow this 2 steps:
  • First Click on Secure Icon Self Studies
  • Second click on the toggle icon
Allow Notification
Get latest Exam Updates & FREE Study Material Alerts!
Self Studies ×
Open Now