Physics-
General
Easy
Question
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 correct answer is:
Related Questions to study
physics-
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
physics-
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
physics-General
physics-
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
physics-General
physics-
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
physics-
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
physics-
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
physics-
The load versus elongation graph for four wires of the same material is shown in the figure. The thinnest wire is represented by the line
The load versus elongation graph for four wires of the same material is shown in the figure. The thinnest wire is represented by the line
physics-General
physics-
Two waves 
and 
are travelling in a pipe placed along x-axis. Find the number of times intensity is maximum in time interval of 1 sec
Two waves and are travelling in a pipe placed along x-axis. Find the number of times intensity is maximum in time interval of 1 sec
physics-General
physics-
A ball moves over a fixed track as shown in the figure. From A to B the ball rolls without slipping. Surface BC is frictionless. KA, KB and KC are kinetic energies of the ball at A, B and C, respectively. Then
A ball moves over a fixed track as shown in the figure. From A to B the ball rolls without slipping. Surface BC is frictionless. KA, KB and KC are kinetic energies of the ball at A, B and C, respectively. Then
physics-General
physics-
A solid cylinder of mass m and radius r is rolling on a rough inclined plane of inclination . The coefficient of friction between the cylinder and incline is 
. Then
A solid cylinder of mass m and radius r is rolling on a rough inclined plane of inclination . The coefficient of friction between the cylinder and incline is . Then
physics-General
physics-
The circular divisions of shown screw gauge are 50. It moves 0.5 mm on main scale in one rotation. The diameter of the ball is
The circular divisions of shown screw gauge are 50. It moves 0.5 mm on main scale in one rotation. The diameter of the ball is
physics-General
physics-
A massless rod is suspended by two identical strings AB and CD of equal length. A block of mass m is suspended from point O such that BO is equal to ‘x’. Further, it is observed that the frequency of 1st harmonic (fundamental frequency) in AB is equal to 2nd harmonic frequency in CD. Then, length of BO is
A massless rod is suspended by two identical strings AB and CD of equal length. A block of mass m is suspended from point O such that BO is equal to ‘x’. Further, it is observed that the frequency of 1st harmonic (fundamental frequency) in AB is equal to 2nd harmonic frequency in CD. Then, length of BO is
physics-General
physics-
Two blocks A and B of masses 2m and m, respectively, are connected by a massless and inextensible string The whole system is suspended by a massless spring as shown in the figure The magnitudes of acceleration of A and B, immediately after the string is cut, are respectively
Two blocks A and B of masses 2m and m, respectively, are connected by a massless and inextensible string The whole system is suspended by a massless spring as shown in the figure The magnitudes of acceleration of A and B, immediately after the string is cut, are respectively
physics-General
physics-
A uniform circular disc with the hole lies over a smooth horizontal surface, C is centre of the disc and A is a point on the rim of the disc as shown. As the temperature is increased.
A uniform circular disc with the hole lies over a smooth horizontal surface, C is centre of the disc and A is a point on the rim of the disc as shown. As the temperature is increased.
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
