List of top Questions asked in KCET, WBJEE

Two satellites of mass $m$ and $9\,m$ are orbiting a planet in orbits of radius $R$. Their periods of revolution will be in the ratio of

If the energies of the two photons are in the ratio of $3 : 2$, their wavelengths will be in the ratio of

The IUPAC name of the complex $[Co (NH_3)_4 Cl_2 ]Cl$ is

The spin only magnetic moment of $Fe^{2+}$ ion $(in\, B.M.)$ is approximately

In Argand's plane, the point corresponding to $\frac {(1-i\sqrt {3})(1+i)} {(\sqrt {3}+i)}$ lies in

A plano-concave lens is made of glass of refractive index $1.5$ and the radius of curvature of its curved face is $100 \,cm$. What is the power of the lens?

If the Earth were to suddenly contract to $\frac{1}{n}$ th of its present radius without any change in its mass, the duration of the new day will be nearly

Hybridization of $C_2$ and $C_3$ of $H_3C - CH = C = CH - CH_3$ are

An object weights $m_1$, in a liquid of density $d_1$ and that in liquid of density $d_2\,$ is $\, m_2.$ The density $d$ of the object is

A particle is moving with a constant speed $v$ in a circle. What is the magnitude of average velocity after half rotation ?

Four charges equal to $-Q$ are placed at the four corners of a square and a charge $q$ is at its centre. lf the system is in equilibrium, the value of $q$ is

A material has Poisson?s ratio $0.50$. If a uniform rod of it suffers a longitudinal strain of $2 ? 10^{-3}$, then the percentage change in volume is

In the circuit shown, the currents $i_1$ and $i_2$ are

In the series $L-C-R$ circuit shown, the impedance is

A conductor wire having $10^{29}$ free electrons/$m^{3}$ carries a current of $20\,A$. If the cross-section of the wire is $1\,mm^{2}$, then the drift velocity of electrons will be ....... $(e\, =\, 1.6 \times10^{-19}C).$

A solution of two liquids boils at a temperature more than the boiling point of either of them. Hence, the binary solution shows

In the given network, the value of $C$, so that an equivalent capacitance between $A$ and $B$ is $3\mu F$, is

The height $y$ and the distance $x$ along the horizontal plane of a projectile on a certain planet (with no surrounding atmosphere) are given by $y\, = \,(8t - 5t^2 )$ metre and $x = 6t$ metre, where $t$ is in second. The velocity of projection is

The resultant of two forces acting at an angle of $120^{\circ}$ is $10\, kg$ wt and is perpendicular to one of the forces . That force is .......

Rutherford's atomic model could account for

Ovule integument gets transformed into

Osteomalacia is a deficiency disease of

The time required for the light to pass through a glass slab (refractive index = $1.5$) of thickness $4 \,mm$ is ($c = 3 \times 10^8\, ms^{-1}$, speed of light in free space).

Longest phase of meiosis

Wavefront is the locus of all points, where the particles of the medium vibrate with the same