List of top Physics Questions asked in IIT JEE

If the weight of an object on earth's surface is 400 N, then weight of the same particle at a depth \(\frac{R}{2}\) from surface would be (R is radius of earth)
For an electron and a proton (mp=1847 me) with same de-broglie wavelength, the ratio of linear momentum is equal to?
The reversible expansion ob an ideal gas under adiabatic and isothermal conditions is shown in the figure. Which of the following statement(s) is (are) correct?

Three infinitely long charge sheets are placed as shown in figure. The electric field at point P is

The energy of a photon is equal to the kinetic energy of a proton. The energy of the photon is E. Let $ \lambda_1 $ be the de-Broglie wavelength of the proton and $ \lambda_2 $ be the wavelength of the photon. The ratio $ \frac{\lambda_1}{\lambda_2} $ is proportional to
The variation of induced emf (e) with time (t) in a coil if a short bar magnet is moved along its axis with a constant velocity is best represented as
The electric potential between a proton and an electron is r given by $V = V_0 in\frac{r}{r_0}, where r_0$ is a constant. Assuming Bohr's model to be applicable, write variation of rn with n, n being the principal quantum number.
Which one of the following spherical lenses does not exhibit dispersion? The radii of curvature of the surfaces of the lenses are as given in the diagrams
Two circular coils can be arranged in any of the three situations shown in the figure. Their mutual inductance will be
Three rods made of the same material and having the same cross-section have been joined as shown in the figure. Each rod is of the same length. The left and right ends are kept at 0$^{\circ}$C and 90$^{\circ}$C respectively. The temperature of junction of the three rods will be
Three positive charges of equal value q are placed at the vertices of an equilateral triangle. The resulting lines of force should be sketched as in
A uniform but time-varying magnetic field B(t) exists in a circular region of radius a and is directed into the plane of the paper as shown. The magnitude of the induced electric field at point P at a distance r from the centre of the circular region
The SI unit of the inductance, the henry can by written as
A thin semicircular conducting ring of radius R is falling with its plane vertical in a horizontal magnetic induction B. At the position MNQ the speed of the ring is v and the potential difference developed across the ring is
When photons of energy 4.25 eV strike the surface of a metal A, the ejected photoelectrons have maximum kinetic energy $T_A$ expressed in eV and de-Broglie wavelength $\lambda_A$. The maximum kinetic energy of photoelectrons liberated from another metal B by photons of energy 4.70 eV is $T_B=(T_A-1.50eV).$ If the de-Broglie wavelength of these photoelectrons is $\lambda_B=2\lambda_A,$ then
Three closed vessels A, B and C at the same temperature T and contain gases which obey the Maxwellian distribution of velocities. Vessel A contains only $O_2$, B only N$_2$ and C a mixture of equal quantities of $O_2$ and N$_2$. If the average speed of the 0 2 molecules in vessel A is $v_1$,, that of the N$_2$ molecules in vessel B is v$_2$, the average speed of the $O_2$ molecules in vessel C is where, M is the mass of an oxygen molecule
Two coherent monochromatic light beams of intensities I and 4I are superposed. The maximum and minimum possible intensities in the resulting beam are