List of top Physics Questions

In a p-n junction photo cell, the value of the photo-electromotive force produced by monochromatic light is proportional to

A particle describes a horizontal circle in a conical funnel whose inner surface is smooth with speed of $ 0.5\,m/s $ . What is the height of the plane of circle from vertex of the funnel?

$ 2\,g $ of water condenses when passed through $ 40\,g $ of water initially at $ 25^{\circ}C $ . The- condensation of steam raises the temperature of water to $ 54.3^{\circ}C $ . What is the latent heat of steam?

The spectral energy distribution of a star is maximum at twice temperature as that of sun. The total energy radiated by star is

In Young's double slit experiment intensity at a point is (1/4) of the maximum intensity. Angular position of this point is

If $M$ is the mass of the earth and $R$ its radius, the ratio of the gravitational acceleration and the gravitational constant is :

From the adjacent figure, the correct observation is

A student unable to answer a question on Newton's laws of motion attempts to pull himself up by tugging on his hair. He will not succeed

A tangent Galvanometer has a reduction factor of $1\,A$ and it is placed with the plane of its coil perpendicular to the magnetic meridian. The deflection produced when a current of $1\,A$ is passed through it is

From the figure describing photoelectric effect we may infer correctly that ........

The relationship between the force $F$ and position $x$ of a body is as shown in the figure. The work done in displacing the body from $x = 1\,m$ to $x = 5\,m$ will be

The given figure is the part of a horizontally stretched net. Section $AB$ is stretched with a force of $10 N$. The tensions in the sections $BC$ and $BF$ are

From the top of a tower of two stones, whose masses are in the ratio $1 : 2$ are thrown one straight up with an initial speed $u$ and the second straight down with the same speed $u$. Then, neglecting air resistance

Two boys are standing at the ends A and B of a ground where AB = a. The boy at B starts running in a direction perpendicular to AB with velocity $v_1$. The boy at A starts running simultaneously with velocity v and catches the other in a time t, where t is

If a liquid does not wet glass, its angle of contact is

For a constant hydraulic stress on an object, the fractional change in the object's volume $(\Delta V / V)$ and its bulk modulus $(B)$ are related as :

A bomb of mass 30kg at rest explodes into two pieces of masses 18kg and 12kg. The velocity of 18kg mass is 6ms^-1. The kinetic energy of the other mass is

Average density of the earth :

If the potential difference across the internal resistance $r_1$ is equal to the emf $E$ of the battery, then

Four metal conductors having different shapes a) a sphere b) cylindrical c) pear d) Lightening conductor are mounted on insulating stands and charged. The one which is best suited to retain the charge for a longer time is

By using only two resistance coils-singly, in series, or in Parallel-one should be able to obtain resistances of $3, 4, 12$ and $16$ ohms. The separate resistances of the coil are

The magnitude of $I$ in ampere unit is

The circular motion of a particle with constant speed is:

A heavy brass sphere is hung from a weightless inelastic spring and as a simple pendulum its time period of oscillation is T. When the sphere is immersed in a non-viscous liquid of density 1/10 that of brass, it will act as a simple pendulum of period :

The relation between time $t$ and distance $x$ is $t = ax^2 + bx$, where $a$ and $b$ are constants. The acceleration is: