List of top Physics Questions asked in JEE Advanced

A particle executes simple harmonic motion between x = - A and x = + A. The time taken for it to go fromO to A /2 is $T_1$ and to go from $ A/2 \, \, to \, \, A \, is \, T_2, $ then
A uniform electric field pointing in positive x-direction exists in a region let Abe the orgin B be the point on the x-axis at x = +1 cm and C be the point on the Y axis at y = +1cm. Then the potentials at the points A, B and C satisfy
Two beams of light having intensities I and 4I interfere to produce a fringe pattern on a screen. The phase difference between the beams is $\pi/2$ at point A and $\pi$ at point B. Then the difference between resultant intensities at A and B is
A cylindrical rod having temperature $T_1$ and $T_2$ at its end. The rate of flow of heat $Q_1$ cal/sec. If all the linear dimension are doubled keeping temperature constant, then rate of flow of heat $Q_2$ will be
A string of negligible mass going over a clamped pulley of mass $m$ supports a block of mass $M$ as shown in the figure. The force on the pulley by the clamp is given by
A simple pendulum has a time period $T_1$ when on the earth's surface and $T_2 $ when taken to a height R above the earth's surface, (where R is the radius of the earth). The value of $ T_2/T_1 $ is
A non-planar loop of conducting wire carrying a current I is placed as shown in the figure. Each of the straight sections of the loop is of length 2a. The magnetic field due to this loop at the point P (a, 0, a) points in the direction
Two pulses in a stretched string, whose centres are initially 8 cm apart, are moving towards each other as shown in the figure. The speed of each pulse is 2 cm/s. After 2 s the total energy of the pulses will be
The ends of a stretched wire of length L are fixed at x = 0 and x = L. In one experiment the displacement of the wire is $y_1=A\, sin\bigg(\frac{\pi x}{L}\bigg)sin\, \omega t$ and energy is $E_1$ and in other experiment its displacement is $y_2=A\, sin\bigg(\frac{2\pi x}{L}\bigg)sin\, 2\, \omega\, t$ and energy is $E_2$ .Then
In a given process of an ideal gas, $dW \,= \,0$ and $dQ < 0$. Then for the gas
p-V plots for two gases during adiabatic processes are shown in the figure. Plots 1 and 2 should correspond respectively to
A hollow double concave lens is made of very thin transparent material. It can be filled with air or either of two liquids \(L_1\space and\space L_2\) having refracting indices \(n_1\space and\space n_2\) respectively \((n_2 > n_1 > 1)\)The lens will diverge a parallel beam of light if it is filled with
The period of oscillation of simple pendulum of length $l$ suspended from the roof of the vehicle which moves without friction, down an inclined plane of inclination $\alpha$, is given by
A diverging beam of light from a point source S having divergence angle $\alpha$ falls symmetrically on a glass slab as shown. The angles of incidence of the two extreme rays are equal. If the thickness of the glass slab is t and its refractive index is n, then the divergence angle of the emergent beam is
A rectangular glass slab ABCD of refractive index $n_1$ is A rectangular glass slab ABCD of refractive index $n_2(n_1 > n_2)$ A ray of light is incident at the surface AB of the slab as shown. The maximum value of the angle of incidence $\alpha_{max}$ such that the ray comes out only from the other surface CD, is given by
Two radioactive materials $X_1$ and $X_2$ have decay constants $10\lambda$ and $\lambda$ respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of $X_1$ to that of $X_2$ will be 1/e after a time
Two long parallel wires are at a distance 2d apart. They carry steady equal currents flowing out of the plane of the paper as shown. The variation of the magnetic field B along the line XX' is given by
Starting with the same initial conditions, an ideal gas expands from volume V$_1$ to V$_2$ in three different ways, the work done by the gas is W$_1$ if the process is purely isothermal, W$_2$ if purely isobaric and W$_3$ if purely adiabatic, then
In a compound microscope, the intermediate image is
An ionized gas contains both positive and negative ions. If it is subjected simultaneously to an electric field along the + x-direction and a magnetic field along the +z-direction, then
An infinitely long conductor PQR is bent to form a right angle as shown in figure. A current I flows through PQR. The magnetic field due to this current at the point M is $H_1$. Now, another infinitely long straight conductor QS is connected at Q, so that current is I/2 in QR as well as in QS, the current in PQ remaining unchanged. The magnetic field at M is now $H_2.$ The ratio $H_1 /H_2$ is given by
A wind-powered generator converts wind energy into electric energy. Assume that the generator converts a fixed fraction of the wind energy intercepted by its blades into electrical energy. For wind speed v, the electrical power output will be proportional to
A monoatomic ideal gas, initially at temperature $T_1$, is enclosed in a cylinder fitted with a frictionless piston. The gas is allowed to expand adiabatically to a temperature T$_2$ by releasing the piston suddenly. If L$_1$ and L$_2$ are the lengths of the gas column before and after expansion respectively, then $T_1 / T_2$ is given by
A cubical block of side L rests on a rough horizontal surface with coefficient of friction $\mu$. A horizontal force F is applied on the block as shown. If the coefficient of friction is sufficiently high, so that the block does not slide before toppling, the minimum force required to topple the block is
A thin wire of length L and uniform linear mass density p is bent into a circular loop with centre at O as shown. The moment of inertia of the loop about the axis XX ' is