List of top Physics Questions

When the angle of projection is $75^\circ$ a ball falls 10 m short of the. target When the angle of projection is $45^\circ$ another balls falls 10 m , a head of target If both an projected from the same point with the same speed then maximum height reached in the second case is.
When ordinary light is made incident on a quarter wave plate, the emergent light is
When light travels from air to glass, the property which does not change is
When forces $F_1,F_2,F_3$ are acting on a particle of mass m such that $F_2$ and $ F_3 $ are mutually perpendicular, then the particle remains stationary, If the force $F_1$ is now removed Then acceleration of the particle is.
When an ideal gas is compressed adiabatically, its temperature rises the molecules on the average have more kinetic energy than before. The kinetic energy increases
When an explosive shell travelling in a parabolic path under the effect of gravity explodes in the mid air, the centre of mass of the fragments will move
When an ac voltage of $220\,V$ is applied to the capacitor $C$, then
When a voltage measuring device is connected to ac mains, the meter shows the steady input voltage of $220\,V$. This means
When a thermometer is taken from the melting ice to a warm liquid, the mercury level rises to $\frac{2^{th}}{5}$ of the distance between the lower and the upper fixed points. The temperature of liquid in $K$ is
When a speeding bus stops suddenly, passengers are thrown forward from their seats because
When a sphere is taken to bottom of sea 1 km deep, it contracts by 0.01%. The bulk modulus of elasticity of the material of sphere is (Given, density of water $= 1 gcm^{-3})$
When a ring is rolling $V_1, V_2, V_3, V_4$ are velocities of top most point, lowest point, end point of horizontal diameter, center of ring respectively. The decreasing order of these velocities is
When a positively charged particle enters a uniform magnetic field with uniform velocity its trajectory can be a) straight line b)a circle c) a helix
When a nucleus in an atom undergoes a radioactive decay, the electronic energy levels of the atom
When a mass is rotating in a plane about a fixed point its angular momentum is directed along
When a low flying aircraft passes overhead, we sometimes notice a slight shaking of the picture on our TV screen. This is because of between the direct signal and reflected signal
When a hydrogen atom is raised from the ground state to an excited state
When a cylindrical tube is dipped vertically into a liquid the angle of contact is $140^{\circ}$. when the tube is dipped with an inclination of $40^{\circ}$ the angle of contact is
When a convex mirror of focal length $f$ produces an image $\left(\frac{1}{n}\right)th$ of the size of the object ,then distance of the object from the mirror is
When a capillary tube is dipped in a liquid, the liquid rises to a height $h$ in the tube. The free liquid surface inside the tube is hemispherical in shape. The tube is now pushed down so that the height of the tube outside the liquid is less than $h$. Then the
When a capillary tube is immersed into a liquid the liqaid neither rises nor falls in the capatillary , then the angle of contact is
When a constant torque is applied on a rigid body, then
When a body slides down from rest along a smooth inclined plane making an angle of $45^?$ with the horizontal, it takes time $T$. When the same body slides down from rest along a rough inclined plane making the same angle and through the same distance, it is seen to take time $pT$, where $p$ is some number greater than $1$. The co-efficient of friction between the body and the rough plane is
When a body lighter than water is completely submettied in water, the body force acting on it is found to be 'n' times its weight. The specific gravity of the material of the body is
what will be the energy loss per hour in the iron core of a transform if the area of its hysteresis loop is equivalent to $2500erg/cm^3$ . The frequency of alternating current is 50 Hz. The mass of core is 10 Kg and the density, of iron is $7.5gm/cm^3$