List of top Physics Questions

Velocity of sound in vacuum is
For the given logic circuit, the correct relation between the input (A, B) and the output (Y) is
given logic circuit, the correct relation
A ball initially at rest, breaks into two masses m1 and m2 that move with speed 11 and v2 respectively as shown. The ratio of the kinetic energy of the right mass to the left mass is:
Which of the following is incorrect for paramagnetic materials?
From a rectangular sheet, the shaded portion is removed. Find the co- ordinates of the center of mass after the portion has been removed.
a rectangular sheet, the shaded portion is removed
A ball of mass 150 gm moving with speed 20m/s is catched in 0.1 sec. find the average force exerted by the hands.
In an electron and a proton are having the same kinetic energy, find the ratio of their linear momentum. (mass of electron = 9.1 x 10-31 kg, mass of proton = 1.67 × 10-27 kg)
The variation of speed (in m/s) of an object with time (in seconds) is given by the expression $V(t) = V_0 - 5t + 5t^2$
A sphere of mass m moving with constant velocity hits another stationary sphere of the same mass. If e is the coefficient of restitution, aid the ratio of velocities of the two spheres after die collision will be
A point source emits sound equally in all directions in a non-absorbing medium. Two points P and Q are at distance of 2m and 3m respectively from the source. The ratio of the intensities of the waves at P and Q is :
A gas is kept in a vessel of volume 0.2 m3 at temperature 300 K and pressure 1 bar. The molar heat capacity of gas at constant volume is 5 cal/mol K. The heat (kcal) required to raise the temperature to 400 K is ______.
Which of the following graph correctly represent the variation δ=dVVdT for an ideal gas at constant pressure?
The de Broglie wavelength of an electron moving with a velocity 1.5 × 108 m/s is equal to that of a photon. The ratio of the energy of the photon to the kinetic energy of the electron is ______.
As per the Bohr model, the minimum energy (in eV) required to remove an electron from the ground state of a double ionized Li atom (Z = 3) is
A uniform solid sphere of radius R has a spherical hole or radius a in it. Find the position of its center of mass.
As given in the figure, a series circuit connected across a 200 V,60 Hz line consists of a capacitor of capacitive reactance 30Ω, a non-inductive resistor of 44Ω, and a coil of inductive resistance 90Ω and resistance 36Ω. The power dissipated in the coil is?
A body is moving unidirectionally under the influence of a source of constant power supplying energy. Which of the diagrams shown in figure correctly shows the displacement-time curve for its motion?
The principle of superposition in wave motion tells that in a motion in which two or more waves are simultaneously producing their displacements in a particle then the resultant
A man of mass 60 kg is standing on a spring balance inside a lift. lf the lift falls freely downwards, then the reading of the spring balance will be
Water rises to a height of 10 cm in a capillary tube and mercury falls to a depth of 3.5 cm in the same capillary tube. If the density of mercury is 13.6 g/cc and its angle of contact is $ 135{}^\circ $ and density of water is 1 g/cc and its angle of contact is $ 0{}^\circ $ , then the ratio of surface tensions of the two liquids is: $ \left( \text{cos }135{}^\circ =0.7 \right) $
The average velocity of a freely falling body is numerically equal to half of the acceleration due to gravity. The velocity of the body as It reaches the ground is
A convex lens of glass is immersed in water compared to its power in air, its power in water will
A uniform disc of mass $M$ and radius $R$ is mounted on an axle supported in friction less bearings. A light cord is wrapped around the rim of the disc and a steady downward pull $T$ is exerted on the cord. The angular acceleration of the disc is:
A $6\, V$ battery is connected to the terminals of a three metre long wire of uniform thickness and resistance of $ 100\,\Omega $ . The difference of potential between two points on the wire separated by a distance of $50 \,cm$ will be
Near a circular loop of conducting wire as shown in the figure an electron moves along a straight line. The direction of the induced current if any in the loop is