List of top Physics Questions asked in WBJEE

In the circuit shown, inputs $A$ and $B$ are in states ?$1$? and ?$0$? respectively. What is the possible stable state of the outputs ?$X$? and ?$Y$? ?
In a triangle $ABC$, the sides $AB$ and $AC$ are represented by the vectors $3 \hat{i} + \hat{j} + \hat{k}$ and $\hat{i} + 2 \hat{j} + \hat{k}$ respectively. Calculate the angle $\angle ABC$
The stress along the length of a rod (with rectangular cross section) is $1\%$ of the Young's modulus of its material. What is the approximate percentage of change of its volume ? (Poisson's ratio of the material of the rod is $0.3$)
The bob of a pendulum of mass �$m$�, suspended by a inextensible string of length �$L$� as shown in the figure carries a small charge �$q$�. An infinite horizontal plane conductor with uniform surface charge density $�\sigma�$ is placed below it. What will be the time period of the pendulum for small amplitude oscillations ?
If the half life of a radioactive nucleus is $3$ days, nearly what fraction of the initial number of nuclei will decay on the $3$rd day ? (Given that $\sqrt[3]{0.25} \approx 0.63)$)
How the linear velocity ?$v$? of an electron in the Bohr orbit is related to its quantum number ?$n$? ?
Four resistors $100 \, \Omega , 200 \, \Omega, 300 \, \Omega$ and $400 \, \Omega$ are connected to form four sides of a square. The resistors can be connected in any order. What is the maximum possible equivalent resistance across the diagonal of the square ?
What will be current through the $200 \, \Omega$ resistor in the given circuit a long time after the switch �K� is made on ?
There is a small air bubble at the center of a solid glass sphere of radius \(r\) and refractive index \(\mu\). What will be the apparent distance of the bubble from the centre of the sphere, when viewed from outside?
The velocity of a particle executing a simple harmonic motion is $13\, ms^{-1}$, when its distance from the equilibrium position (Q) is 3 m and its velocity is $12 \, ms^{-1}$, when it is 5 m away from The frequency of the simple harmonic motion is
A solid rectangular sheet has two different coefficients of linear expansion $\alpha_{1}$ and $\alpha_{2}$ along its length and breadth respectively. The coefficient of surface expansion is (for $\alpha_{1} t < < 1, \alpha_{2} t < < 1$)
A parallel beam of light is incident on a glass prism in the shape of a quarter cylinder of radius $R \,= \,0.05\, m$ and refractive index n = $1.5$ placed on a horizontal table as shown in the figure. Beyond the cylinder, a patch of light is found whose nearest distance $x$ from the cylinder is
The magnetic field due to a current in a straight wire segment of length $L$ at a point on its perpendicular bisector at a distance $r (r >> L)$
A uniform string of length $L$ and mass $M$ is fixed at both ends while it is subject to a tension $T$. It can vibrate at frequencies $(v)$ given by the formula (where $n = 1, 2, 3, .....$)
A uniform capillary tube of length $l$ and inner radius $r$ with its upper end sealed is submerged vertically into water. The outside pressure is $p_0$ and surface tension of water is $\gamma$. When a length $x$ of the capillary is submerged into water, it is found that water levels inside and outside the capillary coincide. The value of $x$ is
A positive charge $Q$ is situated at the centre of a cube. The electric flux through any face of the cube is (in $SI$ units)
When the frequency of the $AC$ voltage applied to a series $LCR$ circuit is gradually increased from a low value, the impedance of the circuit
The de Broglie wavelength of an electron is $0.4 � 10^{-10}$ m when its kinetic energy is $1.0\, keV$. Its wavelength will be $1.0 \times 10^{-10}\, m$, when its kinetic energy is
Two long parallel wires separated by $0.1\, m$ carry currents of $1\, A$ and $2\, A$ respectively in opposite directions. A third current-carrying wire parallel to both of them is placed in the same plane such that it feels no net magnetic force. It is placed at a distance of
A liquid of bulk modulus $k$ is compressed by applying an external pressure such that its density increases by $0.01\%$. The pressure applied on the liquid is
Temperature of an ideal gas, initially at $27^{\circ}$C, is raised by $6^{\circ}$C. The rms velocity of the gas molecules will,
The current flowing through the 3$\Omega$ resistor in the circuit is,
A series LCR circuit resonates at 10 kHZ. If the capacitor is 0.01 $\mu$F, the inductance used is approximately
The minimum and maximum capacitances, which may be obtained by the combination of three capacitors each of capacitance 6$\mu$ F are
Light is an electromagnetic wave whose