Physics-
General
Easy
Question
Two rods of same length and cross-sectional area are joined in series. Thermal conductivity of the rods are in ratio of 2 : 1.
The ends are maintained at temperatures qA and qB as shown with qA > qB and sides are thermally insulated.
Which of the following graph represents temperature gradient (dT/dx) against x in steady state
The correct answer is:
Related Questions to study
physics-
Select the correct statement on the basis of the given graph :
Select the correct statement on the basis of the given graph :
physics-General
physics-
The load versus strain graph for four wires of the same material is shown in the figure. The thickest wire is represented by the line
The load versus strain graph for four wires of the same material is shown in the figure. The thickest wire is represented by the line
physics-General
physics-
The distribution of relative intensity I (
) of blackbody radiation from a solid body versus the wavelength is shown in the figure. If the Wien displacement law constant is 
mK, what is the approximate temperature of the object?
The distribution of relative intensity I () of blackbody radiation from a solid body versus the wavelength is shown in the figure. If the Wien displacement law constant is mK, what is the approximate temperature of the object?
physics-General
physics-
Five rods of same material and same length are joined as shown. Cross-section of rods ab, ad and bc are A, 2A and 3A respectively. Ends a and c are maintained at temperatures 200°C and 0°C respectively.
If x has the value calculated in above question. Then temperature of junction b or d is:
Five rods of same material and same length are joined as shown. Cross-section of rods ab, ad and bc are A, 2A and 3A respectively. Ends a and c are maintained at temperatures 200°C and 0°C respectively.
If x has the value calculated in above question. Then temperature of junction b or d is:
physics-General
physics-
Five rods of same material and same length are joined as shown. Cross-section of rods ab, ad and bc are A, 2A and 3A respectively. Ends a and c are maintained at temperatures 200°C and 0°C respectively.
For what cross-section x of rod dc there will be no heat flow through rod bd.
Five rods of same material and same length are joined as shown. Cross-section of rods ab, ad and bc are A, 2A and 3A respectively. Ends a and c are maintained at temperatures 200°C and 0°C respectively.
For what cross-section x of rod dc there will be no heat flow through rod bd.
physics-General
chemistry-
The formula of ferrocene is
The formula of ferrocene is
chemistry-General
physics-
A uniform rod having length L, is made of material having density r, coefficient of thermal expansion a and young's modulus Y. It is placed between two vertical walls having separation L and coefficient of friction m. What is the minimum rise in temperature so that the rod does not falls down on releasing.
A uniform rod having length L, is made of material having density r, coefficient of thermal expansion a and young's modulus Y. It is placed between two vertical walls having separation L and coefficient of friction m. What is the minimum rise in temperature so that the rod does not falls down on releasing.
physics-General
physics-
S1 & S2 are two coherent sources of sound. OA = OB. AB = 2.7 , when is the wave length of sound waves. Number of points of maximum intensity as one moves around the circular path centered at O shown in the figure will be
S1 & S2 are two coherent sources of sound. OA = OB. AB = 2.7 , when is the wave length of sound waves. Number of points of maximum intensity as one moves around the circular path centered at O shown in the figure will be
physics-General
physics-
S1 & S2 are two coherent sources of sound having no initial phase difference. The velocity of sound is 330 m/s. No minima will be formed on the line passing through S2 and perpendicular to the line joining S1 and S2 , if the frequency of both the sources is:
S1 & S2 are two coherent sources of sound having no initial phase difference. The velocity of sound is 330 m/s. No minima will be formed on the line passing through S2 and perpendicular to the line joining S1 and S2 , if the frequency of both the sources is:
physics-General
physics-
A string consists of two parts attached at x = 0. The right part of the string 
has mass m per unit length and the left part of the string 
has mass ml per unit length. The string tension is T. If a wave of unit amplitude travels along the left part of the string, as shown in the figure, what is the amplitude of the wave that is transmitted to the right part of the string?
A string consists of two parts attached at x = 0. The right part of the string has mass m per unit length and the left part of the string has mass ml per unit length. The string tension is T. If a wave of unit amplitude travels along the left part of the string, as shown in the figure, what is the amplitude of the wave that is transmitted to the right part of the string?
physics-General
physics-
The shape of a string on which standing waves are produced at t = 0 is shown here. The suitable equation of standing wave can be
The shape of a string on which standing waves are produced at t = 0 is shown here. The suitable equation of standing wave can be
physics-General
physics-
In figure a, string 1 has a linear mass density of 3 g/m, and string 2 has a linear mass density of 4.5 g/m. They are under tension due to the hanging block of mass M = 500 g as shown in figure (a)
The block is now divided into two blocks (with M1 + M2 = M) and the apparatus is rearranged as shown in figure b. If the speeds of transverse waves in the two strings are equal the values of M1 and M2 will be respectively
In figure a, string 1 has a linear mass density of 3 g/m, and string 2 has a linear mass density of 4.5 g/m. They are under tension due to the hanging block of mass M = 500 g as shown in figure (a)
The block is now divided into two blocks (with M1 + M2 = M) and the apparatus is rearranged as shown in figure b. If the speeds of transverse waves in the two strings are equal the values of M1 and M2 will be respectively
physics-General
physics-
In figure a, string 1 has a linear mass density of 3 g/m, and string 2 has a linear mass density of 4.5 g/m. They are under tension due to the hanging block of mass M = 500 g as shown in figure (a)
The ratio of speeds of transverse wave in the string 1 to that of string 2 is
In figure a, string 1 has a linear mass density of 3 g/m, and string 2 has a linear mass density of 4.5 g/m. They are under tension due to the hanging block of mass M = 500 g as shown in figure (a)
The ratio of speeds of transverse wave in the string 1 to that of string 2 is
physics-General
physics-
The graph shows a wave travelling to the right with a velocity of 4m/s. The equation that best represent the wave is
The graph shows a wave travelling to the right with a velocity of 4m/s. The equation that best represent the wave is
physics-General
physics-
The figure shows a simple harmonic progressive transverse wave, progressing towards the right. The particle having the maximum acceleration directed downwards is represented by
The figure shows a simple harmonic progressive transverse wave, progressing towards the right. The particle having the maximum acceleration directed downwards is represented by
physics-General
