List of top Questions asked in WBJEE

If $I_{1} = \int\limits^{3\pi}_{0}f\left(\cos^{2}\,x\right)dx$ and $I_{2} = \int\limits^{\pi}_{0} f\left(\cos^{2}\,x\right)dx$, then
The equation of one of the curves whose slope at any point is equal to $y + 2x$ is
How many laminae are present in the grey matter of spinal cord ?
Hormone responsible for the secretion of milk after parturition is
Heparin is produced by -
Colour blindness is due to defect in
Micropropagation is a technique
Root cells of wheat has 2n = 42 chromosomes. Which one of the following is the basic chromosome number of Wheat ?
In a DNA molecule distance between two bases is
Quiescent centre is found in plants at :
When the cell is fully turgid, its
First genetically modified plant commercially released in India is
Bile salts act as activator of which enzyme ?
If a species has $16$ protons, $18$ electrons and $16$ neutrons, find the species and its charge
In Sommerfeld?s modification of Bohr?s theory, the trajectory of an electron in a hydrogen atom is
The value of integral $\int\limits_{-1}^{1} \frac{\left|x+2\right|}{x+2} dx$ is
An electrical cable having a resistance of $0.2 \,\Omega$ delivers $10\,kw$ at $200\,V\, D.C$. to a factory. What is the efficiency of transmission?
The equation $\sqrt{3}\, \sin \,x+\cos\,x = 4$ has
The angle between the lines joining the foci of an ellipse to one particular extremity of the minor axis is $90^{\circ}$ The eccentricity of the ellipse is
It is difficult to cook rice in an open vessel by boiling it at high altitudes because of
The current flowing through a wire depends on time as $I=3t^{2}+2t +5.$ The charge flowing through the cross section of the wire in time from $t = 0$ to $t = 2$ sec. is
Two identical cells each of emf $E$ and internal resistance $r$ are connected in parallel with an external resistance $R$. To get maximum power developed across $R$, the value of $R$ is
The value of $ \displaystyle\lim_{n\to\infty} \left[\frac{n}{n^{2}+1^{2}}+\frac{n}{n^{2}+2^{2}}+\ldots+\frac{1}{n^{2}+2n}\right] $ is
The modulus of $\frac{1-i}{3+i}+\frac{4i}{5}$ is
Two identical light waves, propagating in the same direction, have a phase difference $\delta$. After they superpose the intensity of the resulting wave will be proportional to