List of top Physics Questions asked in AIIMS

A thin wire of mass M and length L is bent to form a circular ring. The moment of inertia of this ring about its axis is
A cylinder of height 1m is filled with water. If a small orifice is made at a height of 0.25 m from the ground, the horizontal range of water stream will be :
A cart has mass 2 metric ton and sand of 1 metric ton is inside the cart. Now a force of 10 N is applied on cart and sand starts to leak with rate of 0.5 kg/s. What is the velocity of cart when total sand has come out from the cart ?
The force between the plates of a parallel plate capacitor is proportional to charge on it. Electric force is equal to charge per unit area.
Centre of mass of a uniform ring of radius R will be at a position
In the circuit shown, the current through the 5 O resistor is
In a potentiometer experiment of a cell of emf $1.25\, V$ gives balancing length of $30\, cm$. If the cell is replaced by another cell, balancing length is found to be $40\, cm$. What is the emf of second cell ?
A current flows in a conductor only when there is an electric field within the conductor. The drift velocity of electron in presence of electric field decreases.
A uniformly charged non conducting disc with surface charge density $10\, nC/m^2$ having radius $3\,cm$. Then find the magnitude of electric field at a point on the perpendicular bisector at a distance $2\,cm$ from origin of the disc.
Net electric field insider conductor is zero. Total positive charge equals to total negative charge in a charged conductor.
The rear side of a truck is open and a box of mass $20\, kg$ is placed on the truck $4\, m$ away from the open end. The coefficient of friction between the box and the surface is $0.15$. The truck starts from rest with an acceleration of $2\, m\, s^{-2}$ on a straight road. The box will fall off the truck when it is at a distance from the starting point equal to
What will be the position of centre of mass of a half disc of uniform mass density as shown
In the diagram $100 \,kg$ block is hanging from a pulley and force $F$ is applied on the string to keep the system in equilibrium. If the whole system is moving up with a constant velocity $v$, then tension at point $P$ in the string will be
Water waves in a river are not polarized. Water waves are longitudinal as well as transverse in nature.
Surface tension decreases with increases in temperature. On increasing temperature kinetic energy increases and intermolecular forces decreases..
Gallium arsenide phosphide is used for making LED. Valance band overlaps with conduction band in case of semionductor.
For angular projection, when angle of projection ? = tan (1), the horizontal range is four times the maximum height. The horizontal range of projectile is directly proportional to square of velocity and inversely proportional to acceleration due to gravity.
A rocket works on the principle of conservation of linear momentum. Higher the velocity, smaller is the pressure and vice-versa.
A boy stands on a weighing machine inside a lift. When the lift is going down with acceleration $g/4$, the machine shows a reading $30 \,kgf$. When the lift goes upwards with acceleration $g/4$, the reading would be
A body starts from rest and travels a distance S with uniform acceleration, then moves uniformly a distance 2S and finally comes to rest after moving further 5S under uniform retardation. The ratio of the average velocity to maximum velocity is
The Young's modulus of a rope of $ 10\,m$ length and having diameter of $2\,cm$ is $ 200\times 10^{11}\,dyne/cm^{2}$ . If the elongation produced in the rope is $ 1\,cm, $ the force applied on the rope is
For a projectile the time of flight of a body becomes n times the original value if its speed is made n times. This is due to the range of the projectile which becomes n times.
A body of mass $m_{1}$ collides elastically with another body of mass $m_{2}$ at rest. If the velocity of $m_{1}$ after collision becomes $ 2/3 $ times its initial velocity, the ratio of their masses, is
A body initially at 80$^{\circ}$C cools to 64$^{\circ}$C in 5 min and to 52$^{\circ}$C in 10 min. The temperature of the surrounding is
A physical quantity X is given by $X=\frac{2k^{3}l^{2}}{m\sqrt{n}}$ The percentage error in the measurements of k, l, m and n are 1%, 2%, 3% and 4% respectively. The value of X is uncertain by