Maths
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If , then _______________


 1
The correct answer is:
Related Questions to study
physics
Which one of the following is graph for perfectly black body? is the frequency of radiation with maximum intensity, is the absolute temperature.
Intensity is directly proportional to energy.
Which one of the following is graph for perfectly black body? is the frequency of radiation with maximum intensity, is the absolute temperature.
physicsGeneral
Intensity is directly proportional to energy.
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Three rods made of same material and having same crosssection are joined as shown in the figure. Each rod is of same length. The temperature at the junction of the three rods is
Let the temperature of function be , then
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Or
Or
Or
Or
Or
Or
Or
Three rods made of same material and having same crosssection are joined as shown in the figure. Each rod is of same length. The temperature at the junction of the three rods is
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Let the temperature of function be , then
Or
Or
Or
Or
Or
Or
Or
Or
physics
The figure shows a glass tube (linear coefficient of expansion is ) completely filled with a liquid of volume expansion coefficient On heating length of the liquid column does not change. Choose the correct relation between and
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
Now we can write
Since
Hence
The figure shows a glass tube (linear coefficient of expansion is ) completely filled with a liquid of volume expansion coefficient On heating length of the liquid column does not change. Choose the correct relation between and
physicsGeneral
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
Now we can write
Since
Hence
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
Area under given curve represents emissive power and emissive power
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
physicsGeneral
Area under given curve represents emissive power and emissive power
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In a vertical Utube 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
Suppose, height of liquid in each arm before rising the temperature is .
With temperature rise height of liquid in each arm increases
Also
With temperature rise height of liquid in each arm increases
Also
In a vertical Utube 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
physicsGeneral
Suppose, height of liquid in each arm before rising the temperature is .
With temperature rise height of liquid in each arm increases
Also
With temperature rise height of liquid in each arm increases
Also
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
The metal X has a higher coefficient of expansion compared to that for metal Y so, on placing bimetallic strip in a cold bath, X will shrink more than . Hence, the strip will bend towards the left.
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
physicsGeneral
The metal X has a higher coefficient of expansion compared to that for metal Y so, on placing bimetallic strip in a cold bath, X will shrink more than . Hence, the strip will bend towards the left.
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
Let the temperature of common interface be . Rate of heat flow
=
And =
In steady state, the rate of heat flow should be same in whole system
=
(i)
Hence, heat flow from composite slab is
= (ii)
Accordingly, (iii)
By comparing Eqs. (ii) and (iii), we get
=
And =
In steady state, the rate of heat flow should be same in whole system
=
(i)
Hence, heat flow from composite slab is
= (ii)
Accordingly, (iii)
By comparing Eqs. (ii) and (iii), we get
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
physicsGeneral
Let the temperature of common interface be . Rate of heat flow
=
And =
In steady state, the rate of heat flow should be same in whole system
=
(i)
Hence, heat flow from composite slab is
= (ii)
Accordingly, (iii)
By comparing Eqs. (ii) and (iii), we get
=
And =
In steady state, the rate of heat flow should be same in whole system
=
(i)
Hence, heat flow from composite slab is
= (ii)
Accordingly, (iii)
By comparing Eqs. (ii) and (iii), we get
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
physicsGeneral
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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
According to Wien’s displacement law . Hence, it temperature increases decreases peak of the curve shift towards left
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
physicsGeneral
According to Wien’s displacement law . Hence, it temperature increases decreases peak of the curve shift towards left
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
Let be temperature of middle point and in series rate of heat flow is same
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
physicsGeneral
Let be temperature of middle point and in series rate of heat flow is same
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?
Let the temperature of junction be
3
12
3
12
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?
physicsGeneral
Let the temperature of junction be
3
12
3
12
Maths
Which function is shown in graph?
Which function is shown in graph?
MathsGeneral
Maths
Which function is shown in graph?
Which function is shown in graph?
MathsGeneral
Maths
Which function is shown in graph?
Which function is shown in graph?
MathsGeneral
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
The equivalent electrical circuit, figure in these cases is of Wheatstone bridge. No current would flow through central rod when the bridge is balanced. The condition for balanced Wheatstone bridge is (in terms of resistances)
or
Or
or
Or
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
physicsGeneral
The equivalent electrical circuit, figure in these cases is of Wheatstone bridge. No current would flow through central rod when the bridge is balanced. The condition for balanced Wheatstone bridge is (in terms of resistances)
or
Or
or
Or