List of top Physics Questions

In any fission process the ratio $\frac{mass \, of \, fission \, products}{mass \, of \, parent \, nucleus} is$

Two batteries, one of emf 18 volts and internal resistance $2\, \Omega$ and the other of emf 12 volts and internal resistance $1\, \Omega$ are connected as shown. The voltmeter V will record a reading of

Which of the following circular rods,(given radius r and length l)each made of the same material and whose ends are maintained at the same temperature will conduct most heat?

When a wire of uniform cross-section a, length l and resistance R is bent into a complete circle, resistance between any two of diametrically opposite points will be

A coil in the shape of an equilateral triangle of side l is suspended between the pole pieces of a permanent magnet such that $\vec{B}$ is in plane of the coil. If due to a current i in the triangle a torque $ \tau $ acts on it, the side l of the triangle is

A force $F$ acting on an object varies with distance $x$ as shown in the figure. The force is in $N$ and $x$ in $m$. The work done by the force in moving the obiect from $x=0$ to $x = 6 \,m$ is

In any fission process the ratio (mass of fission products/mass of parent nucleus) is :

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

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