Physics-
General
Easy

Question

The figure given below shows the cooling curve of pure wax material after heating. It cools from A to B and solidifies along BD. If L and C are respective values of latent heat and the specific heat of the liquid wax, the ratio L/C is

  1. 40    
  2. 80    
  3. 100    
  4. 20    

The correct answer is: 20


    Let the quantity of heat supplied per minute be Q. Then quantity of heat supplied in 2 min equals m C left parenthesis 90 minus 80 right parenthesis
    In 4 min, heat supplied equals 2 m C left parenthesis 90 minus 80 right parenthesis
    \ 2 m C left parenthesis 90 minus 80 right parenthesis equals m L Þ fraction numerator L over denominator C end fraction equals 20

    Related Questions to study

    General
    Physics-

    The portion AB of the indicator diagram representing the state of matter denotes

    The portion AB of the indicator diagram representing the state of matter denotes

    Physics-General
    General
    Physics-

    The graph shows the variation of temperature (T) of one kilogram of a material with the heat (H) supplied to it. At O, the substance is in the solid state. From the graph, we can conclude that

    The graph shows the variation of temperature (T) of one kilogram of a material with the heat (H) supplied to it. At O, the substance is in the solid state. From the graph, we can conclude that

    Physics-General
    General
    Physics-

    The graph AB shown in figure is a plot of temperature of a body in degree celsius and degree Fahrenheit. Then

    The graph AB shown in figure is a plot of temperature of a body in degree celsius and degree Fahrenheit. Then

    Physics-General
    parallel
    General
    Physics-

    In a vertical U-tube containing a liquid, the two arms are maintained at different temperatures t subscript 1 end subscript and t subscript 2 end subscript. The liquid columns in the two arms have heights l subscript 1 end subscript and l subscript 2 end subscript respectively. The coefficient of volume expansion of the liquid is equal to

    In a vertical U-tube containing a liquid, the two arms are maintained at different temperatures t subscript 1 end subscript and t subscript 2 end subscript. The liquid columns in the two arms have heights l subscript 1 end subscript and l subscript 2 end subscript respectively. The coefficient of volume expansion of the liquid is equal to

    Physics-General
    General
    Physics-

    A cylindrical metal rod of length L0 is shaped into a ring with a small gap as shown. On heating the system

    A cylindrical metal rod of length L0 is shaped into a ring with a small gap as shown. On heating the system

    Physics-General
    General
    Physics-

    A tank is filled upto a height h with a liquid and is placed on a platform of height h from the ground. To get maximum range x subscript m end subscript a small hole is punched at a distance of y from the free surface of the liquid. Then

    A tank is filled upto a height h with a liquid and is placed on a platform of height h from the ground. To get maximum range x subscript m end subscript a small hole is punched at a distance of y from the free surface of the liquid. Then

    Physics-General
    parallel
    General
    Physics-

    Water coming out of the mouth of a tap and falling vertically in streamline flow forms a tapering column, i.e., the area of cross-section of the liquid column decreases as it moves down. Which of the following is the most accurate explanation for this

    Water coming out of the mouth of a tap and falling vertically in streamline flow forms a tapering column, i.e., the area of cross-section of the liquid column decreases as it moves down. Which of the following is the most accurate explanation for this

    Physics-General
    General
    Physics-

    A cubical block of wood 10 cm on a side floats at the interface between oil and water with its lower surface horizontal and 4 cm below the interface. The density of oil is 0.6 g c m to the power of negative 3 end exponent. The mass of block is

    A cubical block of wood 10 cm on a side floats at the interface between oil and water with its lower surface horizontal and 4 cm below the interface. The density of oil is 0.6 g c m to the power of negative 3 end exponent. The mass of block is

    Physics-General
    General
    Physics-

    Water flows through a frictionless duct with a cross-section varying as shown in fig. Pressure p at points along the axis is represented by

    Water flows through a frictionless duct with a cross-section varying as shown in fig. Pressure p at points along the axis is represented by

    Physics-General
    parallel
    General
    Physics-

    The diagram shows a cup of tea seen from above. The tea has been stirred and is now rotating without turbulence. A graph showing the speed v with which the liquid is crossing points at a distance X from O along a radius XO would look like

    The diagram shows a cup of tea seen from above. The tea has been stirred and is now rotating without turbulence. A graph showing the speed v with which the liquid is crossing points at a distance X from O along a radius XO would look like

    Physics-General
    General
    Physics-

    A small spherical solid ball is dropped from a great height in a viscous liquid. Its journey in the liquid is best described in the diagram given below by the

    A small spherical solid ball is dropped from a great height in a viscous liquid. Its journey in the liquid is best described in the diagram given below by the

    Physics-General
    General
    Physics-

    There are two identical small holes of area of cross-section a on the opposite sides of a tank containing a liquid of density rho. The difference in height between the holes is h. Tank is resting on a smooth horizontal surface. Horizontal force which will has to be applied on the tank to keep it in equilibrium is

    There are two identical small holes of area of cross-section a on the opposite sides of a tank containing a liquid of density rho. The difference in height between the holes is h. Tank is resting on a smooth horizontal surface. Horizontal force which will has to be applied on the tank to keep it in equilibrium is

    Physics-General
    parallel
    General
    Physics-

    A cylinder containing water up to a height of 25 cm has a hole of cross-section fraction numerator 1 over denominator 4 end fraction c m to the power of 2 end exponent in its bottom. It is counterpoised in a balance. What is the initial change in the balancing weight when water begins to flow out

    A cylinder containing water up to a height of 25 cm has a hole of cross-section fraction numerator 1 over denominator 4 end fraction c m to the power of 2 end exponent in its bottom. It is counterpoised in a balance. What is the initial change in the balancing weight when water begins to flow out

    Physics-General
    General
    Physics-

    Water is filled in a cylindrical container to a height of 3m. The ratio of the cross-sectional area of the orifice and the beaker is 0.1. The square of the speed of the liquid coming out from the orifice is (g = 10 m/s2)

    Water is filled in a cylindrical container to a height of 3m. The ratio of the cross-sectional area of the orifice and the beaker is 0.1. The square of the speed of the liquid coming out from the orifice is (g = 10 m/s2)

    Physics-General
    General
    Physics-

    A body floats in a liquid contained in a beaker. The whole system as shown falls freely under gravity. The upthrust on the body due to the liquid is

    A body floats in a liquid contained in a beaker. The whole system as shown falls freely under gravity. The upthrust on the body due to the liquid is

    Physics-General
    parallel

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.