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General
Easy
Question
A smooth wedge of mass m and angle of inclination 60° rests unattached between two springs of spring constant k and 4k, on a smooth horizontal plane, both springs in the unexpended position. The time period of small oscillations of the wedge (assuming that the springs are constrained to get compressed along their length) equals
- none of the above
The correct answer is:
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A concave spherical surface of radius of curvature 10cm separates two medium x & y of refractive index 4/3 & 3/2 respectively. If the object is placed along principal axis in medium X then
A concave spherical surface of radius of curvature 10cm separates two medium x & y of refractive index 4/3 & 3/2 respectively. If the object is placed along principal axis in medium X then
physics-General
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The value of v0 for which the block has zero velocity when spring is in its natural position is
The value of v0 for which the block has zero velocity when spring is in its natural position is
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PQ is a smooth inclined plane whose angle of inclination 
can be varied in such a way that point Q remains fixed & P can move on a vertical line PR. A particle slides from rest from point P. At different values of time for descent td from P to Q is noted. The following statement is true about td:
PQ is a smooth inclined plane whose angle of inclination can be varied in such a way that point Q remains fixed & P can move on a vertical line PR. A particle slides from rest from point P. At different values of time for descent td from P to Q is noted. The following statement is true about td:
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In figure, find the minimum value mass m of the rod so that the block of mass M = 20 kg remains stationary on the inclined plane. Assume friction as absent between m & M, also between m and the supports
In figure, find the minimum value mass m of the rod so that the block of mass M = 20 kg remains stationary on the inclined plane. Assume friction as absent between m & M, also between m and the supports
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In the figure ABC is the cross section of a right angled prism and BCDE is the cross section of a glass slab. The value of q so that light incident normally on the face AB does not cross the face BC is (given sin–1 (3/5) = 37°)
In the figure ABC is the cross section of a right angled prism and BCDE is the cross section of a glass slab. The value of q so that light incident normally on the face AB does not cross the face BC is (given sin–1 (3/5) = 37°)
physics-General
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A hollow copper sphere & a hollow copper cube , of same surface area & negligible thickness, are filled with warm water of same temperature and placed in an enclosure of constant temperature, a few degrees below that of the bodies. Then in the beginning
A hollow copper sphere & a hollow copper cube , of same surface area & negligible thickness, are filled with warm water of same temperature and placed in an enclosure of constant temperature, a few degrees below that of the bodies. Then in the beginning
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A sphere of radius R comes in contact with wedge moving as shown. The point of contact is R/5 from the ground as shown in the figure. Velocity of wedge is 20 m/ s, then the velocity of the sphere at this instant will be
A sphere of radius R comes in contact with wedge moving as shown. The point of contact is R/5 from the ground as shown in the figure. Velocity of wedge is 20 m/ s, then the velocity of the sphere at this instant will be
physics-General
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The position–time (x–t) graphs for two children A and B returning from their school O to their homes P and Q respectively along straight line path (taken as x axis) are shown in figure below. Choose the correct statement (s):
The position–time (x–t) graphs for two children A and B returning from their school O to their homes P and Q respectively along straight line path (taken as x axis) are shown in figure below. Choose the correct statement (s):
physics-General
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The solar constant of earth is 2 cal/min-
. If distance of mercury planet from sun is 0.4 times the distance of earth from the sun, then solar constant of mercury planet will be:
The solar constant of earth is 2 cal/min-. If distance of mercury planet from sun is 0.4 times the distance of earth from the sun, then solar constant of mercury planet will be:
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Figure, shows roughly how the force F between two adjacent atoms in a solid varies with separation r. Which statements are correct?
1] OQ is the equilibrium separation
2] Hooke's law is obeyed around P
3] The potential energy of the atoms is the gradient of the graph at all points
4] The energy to separate the atoms completely is obtained from the area enclosed below the axis of r
Figure, shows roughly how the force F between two adjacent atoms in a solid varies with separation r. Which statements are correct?
1] OQ is the equilibrium separation
2] Hooke's law is obeyed around P
3] The potential energy of the atoms is the gradient of the graph at all points
4] The energy to separate the atoms completely is obtained from the area enclosed below the axis of r
physics-General
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An object O is placed in front of a small plane mirror M1 and a large convex mirror M2 of focal length f. The distance between O and M1 is x, and the distance between M1 and M2 is y. The images of O formed by M1 and M2 coincide. The magnitude of f is
An object O is placed in front of a small plane mirror M1 and a large convex mirror M2 of focal length f. The distance between O and M1 is x, and the distance between M1 and M2 is y. The images of O formed by M1 and M2 coincide. The magnitude of f is
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The circular boundary of the concave mirror subtends a cone of half angle at its centre of curvature. The minimum value of for which ray incident on this mirror parallel to the principle axis suffers reflection more than one is
The circular boundary of the concave mirror subtends a cone of half angle at its centre of curvature. The minimum value of for which ray incident on this mirror parallel to the principle axis suffers reflection more than one is
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A pan balance has a container of water with an overflow spout on the right-hand pan as shown. It is full of water right up to the overflow spout. A container on the left-hand pan is positioned to catch any water that overflows. The entire apparatus is adjusted so that it’s balanced. A brass weight on the end of a string is then lowered into the water, but not allowed to rest on the bottom of the container. What happens next?
A pan balance has a container of water with an overflow spout on the right-hand pan as shown. It is full of water right up to the overflow spout. A container on the left-hand pan is positioned to catch any water that overflows. The entire apparatus is adjusted so that it’s balanced. A brass weight on the end of a string is then lowered into the water, but not allowed to rest on the bottom of the container. What happens next?
physics-General
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A mechanism consists of a part which is translated with a velocity u and a rod AB of length L and mass M hinged at A. The rod rotates about axis A with angular velocity 
. The kinetic energy of rod when it is vertical as shown is
A mechanism consists of a part which is translated with a velocity u and a rod AB of length L and mass M hinged at A. The rod rotates about axis A with angular velocity . The kinetic energy of rod when it is vertical as shown is
physics-General
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If M < m, the number of collisions between the balls will be:
If M < m, the number of collisions between the balls will be:
physics-General
