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General
Easy
Question
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
- 2
- 4
The correct answer is: 4
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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 :
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Two identical glass spheres filled with air are connected by a thin horizontal glass tube. The glass tube contains a pellet of mercury at its mid-point. Air in one sphere is at 0°C and the other is at 20°C. If temperature of both the vessels are increased by 10°C, then neglecting the expansions of the bulbs and the tube
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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 
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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 as shown with and sides are thermally insulated.
Which of the following graph represents temperature gradient (dT/dx) against x in steady state
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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
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The distribution of relative intensity I(
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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.
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A mass on the end of a spring oscillates with the displacement versus time graph shown to the right. Which of the following statements about its motion is CORRECT?
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A wire having cross-sectional area S is attached to wall on one side and a block of mass M on the other side which placed on a horizontal surface having coefficient of friction mas shown. Material of wire has coefficient of thermal expansion 
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A wire having cross-sectional area S is attached to wall on one side and a block of mass M on the other side which placed on a horizontal surface having coefficient of friction mas shown. Material of wire has coefficient of thermal expansion and Young's modulus Y. At initial temperature there is no stress in the wire. Now the wire is cooled. At what decrease in temperature the block will begin to move.
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Select the correct alternative(s).
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Two blocks are arranged as shown in the figure. The relation between acceleration a1 and a2 is :
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In figure shown on the right, the mass of the trolley is 100 kg, and it can move without friction on the horizontal floor. Its length is 12m. The mass of the girl is 50 kg. Friction exists between the shoes of the girl and the trolley’s upper surface, with 
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At a certain moment when the girl was accelerating, the earth frame acceleration of the trolley is found to be 1 m/s2 At this moment, the friction force between the girl’s shoes and the trolley’s surface is
In figure shown on the right, the mass of the trolley is 100 kg, and it can move without friction on the horizontal floor. Its length is 12m. The mass of the girl is 50 kg. Friction exists between the shoes of the girl and the trolley’s upper surface, with = 1/3. The girl can run with a maximum speed = 9 m/s on the surface of the trolley, with respect to the surface. At t = 0 the girl starts running from rest to the right. The trolley was initially stationary.(g = 10 m/s2 )
At a certain moment when the girl was accelerating, the earth frame acceleration of the trolley is found to be 1 m/s2 At this moment, the friction force between the girl’s shoes and the trolley’s surface is
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