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Question
An ideal gas undergoes a thermodynamics cycle as shown in figure. Which of the following graphs represents the same cycle?
The correct answer is:
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An ideal gas mixture filled inside a balloon expands according to the relation PV2/3 = constant. The temperature inside the balloon is
An ideal gas mixture filled inside a balloon expands according to the relation PV2/3 = constant. The temperature inside the balloon is
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PV curve for the process whose VT curve is
PV curve for the process whose VT curve is
physics-General
physics-
A long plank P of the mass 5 kg is placed on a smooth floor. On P is placed a block Q of mass 2 kg. The coefficient of friction between P and Q is 0.5. If a horizontal force 15N is applied to Q, as shown, and you may take g as 10N/kg.
A long plank P of the mass 5 kg is placed on a smooth floor. On P is placed a block Q of mass 2 kg. The coefficient of friction between P and Q is 0.5. If a horizontal force 15N is applied to Q, as shown, and you may take g as 10N/kg.
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From a uniform disc of radius R, an equilateral triangle of side 3 R is cut as shown. The new position of centre of mass is :
From a uniform disc of radius R, an equilateral triangle of side 3 R is cut as shown. The new position of centre of mass is :
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A truck moving on horizontal road towards east with velocity 20 ms–1 collides elastically with a light ball moving with velocity 25 ms–1 along west. The velocity of the ball just after collision
A truck moving on horizontal road towards east with velocity 20 ms–1 collides elastically with a light ball moving with velocity 25 ms–1 along west. The velocity of the ball just after collision
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A force F = Be–Ct acts on a particle whose mass is m and whose velocity is 0 at t = 0. It’s terminal velocity is :
A force F = Be–Ct acts on a particle whose mass is m and whose velocity is 0 at t = 0. It’s terminal velocity is :
physics-General
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A cuboid ABCDEFGH is anisotropic with 
. Coefficient of superficial expansion of faces can be
A cuboid ABCDEFGH is anisotropic with . Coefficient of superficial expansion of faces can be
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In the system shown in the figure there is no friction anywhere. The block C goes down by a distance x0 = 10 cm with respect to wedge D when system is released from rest. The velocity of A with respect to B will be (g=10 m/s2 )
In the system shown in the figure there is no friction anywhere. The block C goes down by a distance x0 = 10 cm with respect to wedge D when system is released from rest. The velocity of A with respect to B will be (g=10 m/s2 )
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Block B of mass 100 kg rests on a rough surface of friction coefficient 
= 1/3. A rope is tied to block B as shown in figure. The maximum acceleration with which boy A of 25 kg can climbs on rope without making block move is :
Block B of mass 100 kg rests on a rough surface of friction coefficient = 1/3. A rope is tied to block B as shown in figure. The maximum acceleration with which boy A of 25 kg can climbs on rope without making block move is :
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Two masses m and M are attached to the strings as shown in the figure. If the system is in equilibrium, then
Two masses m and M are attached to the strings as shown in the figure. If the system is in equilibrium, then
physics-General
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With what minimum velocity should block be projected from left end A towards end B such that it reaches the other end B of conveyer belt moving with constant velocity v. Friction coefficient between block and belt is m.
With what minimum velocity should block be projected from left end A towards end B such that it reaches the other end B of conveyer belt moving with constant velocity v. Friction coefficient between block and belt is m.
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A disc arranged in a vertical plane has two groves of same length directed along the vertical chord AB and CD as shown in the fig. The same particles slide down along AB and CD. The ratio of the time tAB/tCD is
A disc arranged in a vertical plane has two groves of same length directed along the vertical chord AB and CD as shown in the fig. The same particles slide down along AB and CD. The ratio of the time tAB/tCD is
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In the arrangement shown in the figure, mass of the block B and A is 2m and m respectively. Surface between B and floor is smooth. The block B is connected to the block C by means of a string pulley system. If the whole system is released, then find the minimum value of mass of block C so that block A remains stationary w.r.t. B. Coefficient of friction between A and B is m :
In the arrangement shown in the figure, mass of the block B and A is 2m and m respectively. Surface between B and floor is smooth. The block B is connected to the block C by means of a string pulley system. If the whole system is released, then find the minimum value of mass of block C so that block A remains stationary w.r.t. B. Coefficient of friction between A and B is m :
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A uniform rod of length L and mass M has been placed on a rough horizontal surface. The horizontal force F applied on the rod is such that the rod is just in the state of rest. If the coefficient of friction varies according to the relation m = Kx where K is a +ve constant. Then the tension at mid point of rod is
A uniform rod of length L and mass M has been placed on a rough horizontal surface. The horizontal force F applied on the rod is such that the rod is just in the state of rest. If the coefficient of friction varies according to the relation m = Kx where K is a +ve constant. Then the tension at mid point of rod is
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A block of mass M on a horizontal smooth surface is pulled by a load of mass M /2 by means of a rope AB and string BC as shown in the figure. The length & mass of the rope AB are L and M /2 respectively. As the block is pulled from AB = L to AB = 0 its acceleration changes from
A block of mass M on a horizontal smooth surface is pulled by a load of mass M /2 by means of a rope AB and string BC as shown in the figure. The length & mass of the rope AB are L and M /2 respectively. As the block is pulled from AB = L to AB = 0 its acceleration changes from
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