List of top Physics Questions

The radius of curvature of a thin planoconvex lens is 10 cm and the refractive index is 1.5. If the plane surface is silvered then it behaves like a concave mirror of focal length
The propagation constant of a wave is also called its
The probability of safe arrival of one ship out of five is $\left(\frac{1}{5} \right)$ . The probability of safe arrival of atleast 3 ship is:
The probability of getting at least 2 heads, when an unbiased coin is tossed 6 times is
The primary winding of a transformer has 100 turns and its secondary winding has 200 turns. The primary is connected to an A.C. supply of 120 V and the current flowing in it is 10 A. The voltage and the current in the secondary are
The pressure and density of a diatomic gas $\left(\gamma=\frac{7}{5}\right)$ change adiabatically from $\left(P, ?\right)$ to $\left(P? If $\frac{\rho'}{\rho}=32$, then $\frac{P '}{P}$ is
The power of a lens used to remove the myopic defect of eye is 0.66D: The far point of this eye is (nearly)
The potential energy of a particle $4(U_x)$ executing SHM is given by
The potential energy of a spring when stretched through a distance $x$ is $10\, J$. What is the amount of work done on the same spring to stretch it through an additional distance $x$ ?
The potential at a point P due to an electric dipole is $1.8 \times 10^5 \, V$. If P is at a distance of 50 cm apart from the centre O of the dipole and if CP makes an angle 60? with the positive side of the axial line of the dipole, what is the moment of the dipole?
The potential difference between the points $A$ and $B$ in the adjoining circuit diagram will be
The position of the centre of mass of a cube of uniform mass density will be at
The position of an object moving along $x$-axis is given by $x = a + bt^2$, where $a = 8.5 \,m$ and $b = 2.5\, m \,s^{-2}$ and $t$ is measured in seconds. The instantaneous velocity of the object at $t = 2\,s$ is
The poisson's ratio cannot have the, value
The Poisson?? ratio of the material is 0.5. If a force is applied to a wire of this material, there is a decrease in the cross-sectional area by 4%. The percentage increase in its length is
The plane passing through the point (-2, -2, 2) and containing the line joining the points (1, 1, 1) and (1, -1, 2) makes intercepts on the coordiantes axes, the sum of whose lengths is
The piston in the cylinder head of a locomotive has a stroke of $6 \,m$. If the piston executing simple harmonic motion with an angular frequency of $200 \,rad\, min^{-1}$ , its maximum speed is
The physical quantity which has dimensional formula as that of $\frac{Energy}{Mass \,\times\, Length}$ is
The physical quantity that has no dimensions is:
The physical quantity having the same dimensional formula as that of entropy is :
The photoelectric current can be increased by
The photoelectric cut off voltage in a certain experiment is $1.5\, V$. The maximum kinetic energy of photoelectrons emitted is
The phase difference between velocity and acceleration of simple harmonic oscillator.
The period of revolution of an earth's satellite close to surface of earth is 90 min. The time period of another satellite in an orbit at a distance of four times the radius of earth from its surface will be
The peak voltage of input a.c. to a full wave rectifier is $E_0$ The peak inverse voltage is