Physics-
General
Easy
Question
The figure shows a glass tube (linear co-efficient of expansion is 
) completely filled with a liquid of volume expansion co-efficient 
On heating length of the liquid column does not change. Choose the correct relation between 
and
The correct answer is:
When length of the liquid column remains constant, then the level of liquid moves down with respect to the container, thus must be less than 
Now we can write 
Since 
Hence 
Related Questions to study
physics-
The spectrum of a black body at two temperatures 
and 
is shown in the figure. Let 
and 
be the areas under the two curves respectively. The value of 
is
The spectrum of a black body at two temperatures and is shown in the figure. Let and be the areas under the two curves respectively. The value of is
physics-General
physics-
In a vertical U-tube containing a liquid, the two arms are maintained at different temperatures 
and 
The liquid columns in the two arms have heights 
and 
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 and The liquid columns in the two arms have heights and respectively. The coefficient of volume expansion of the liquid is equal to
physics-General
physics-
A bimetallic strip consists of metals 
and 
. It is mounted rigidly at the base as shown. The metal has a higher coefficient of expansion compared to that for metal . when bimetallic strip is placed in a cold bath
A bimetallic strip consists of metals and . It is mounted rigidly at the base as shown. The metal has a higher coefficient of expansion compared to that for metal . when bimetallic strip is placed in a cold bath
physics-General
physics-
The temperature of the two outer surfaces of a composite slab, consisting of two materials having coefficients of thermal conductivity 
and 2 and thickness 
and 4, respectively are 
and 
. The rate of heat transfer through the slab, in a steady state is 
, with 
equals to
The temperature of the two outer surfaces of a composite slab, consisting of two materials having coefficients of thermal conductivity and 2 and thickness and 4, respectively are and . The rate of heat transfer through the slab, in a steady state is , with equals to
physics-General
physics-
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
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
physics-General
physics-
The energy distribution 
with the wavelength 
for the black body radiation at temperature 
is shown in the figure. As the temperature is increased the maxima will
The energy distribution with the wavelength for the black body radiation at temperature is shown in the figure. As the temperature is increased the maxima will
physics-General
physics-
A metal rod of length 
has cross sectional areas 
and 
as shown in figure. The ends are maintained at temperatures 
and 
. The temperature at middle point 
is
A metal rod of length has cross sectional areas and as shown in figure. The ends are maintained at temperatures and . The temperature at middle point is
physics-General
physics-
The coefficient of thermal conductivity of copper is nine times that of steel. In the composite cylindrical bar show in figure, what will be the temperature at the junction of copper ad steel?
The coefficient of thermal conductivity of copper is nine times that of steel. In the composite cylindrical bar show in figure, what will be the temperature at the junction of copper ad steel?
physics-General
Maths-
Which function is shown in graph?
Which function is shown in graph?
Maths-General
Maths-
Which function is shown in graph?
Which function is shown in graph?
Maths-General
Maths-
Which function is shown in graph?
Which function is shown in graph?
Maths-General
physics-
Five rods of same dimensions are arranged as shown in figure. They have thermal conductivities 
When points 
are maintained at different temperature, no heat would flow through central rod, if
Five rods of same dimensions are arranged as shown in figure. They have thermal conductivities When points are maintained at different temperature, no heat would flow through central rod, if
physics-General
physics-
If two metallic plates of equal thicknesses and thermal conductivities 
and 
are put together face to face and a common plate is constructed, then the equivalent thermal conductivity of this plate will be
If two metallic plates of equal thicknesses and thermal conductivities and are put together face to face and a common plate is constructed, then the equivalent thermal conductivity of this plate will be
physics-General
physics-
The graph, shown in the adjacent diagram, represents the variation of temperature 
of two bodies, and 
having same surface area, with time (
) due to the emission of radiation. Find the correct relation between the emissivity and absorptivity power of the two bodies.
The graph, shown in the adjacent diagram, represents the variation of temperature of two bodies, and having same surface area, with time () due to the emission of radiation. Find the correct relation between the emissivity and absorptivity power of the two bodies.
physics-General
maths-
maths-General
