Physics-
General
Easy
Question
An ideal monoatomic gas is carried around the cycle ABCDA as shown in the figure. The efficiency of the gas cycle is :
- 4/21
- 2/21
- 4/31
- 2/31
The correct answer is: 4/21
Related Questions to study
physics-
The initial state of an ideal gas is represented by the point a on the P-V diagram and its final state by the point e. The gas goes from the state a to the state e by three quasi stationary processes represented by
i) abe
ii) ace
iii) ade.
The heat absorbed by the gas is
The initial state of an ideal gas is represented by the point a on the P-V diagram and its final state by the point e. The gas goes from the state a to the state e by three quasi stationary processes represented by
i) abe
ii) ace
iii) ade.
The heat absorbed by the gas is
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The P.V. diagram of a certain process (Carnot cycle) is as shown in the figure.
The process is represented as
The P.V. diagram of a certain process (Carnot cycle) is as shown in the figure.
The process is represented as
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The following graphs shows two isotherms for a fixed mass of an ideal gas. The ratio of r.m.s. speed of the molecules at temperatures T1 and T2 is
The following graphs shows two isotherms for a fixed mass of an ideal gas. The ratio of r.m.s. speed of the molecules at temperatures T1 and T2 is
physics-General
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A volume V-temperature T diagram was obtained when a given mass of gas was heated. During the heating process from state 1 to state 2, the pressure :
A volume V-temperature T diagram was obtained when a given mass of gas was heated. During the heating process from state 1 to state 2, the pressure :
physics-General
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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
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
physics-General
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Select the correct statement on the basis of the given graph :
Select the correct statement on the basis of the given graph :
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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
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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
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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
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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
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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.
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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
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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
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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
