List of top Questions asked in JKCET- 2012

A certain vector in the $x y$ plane has an $x$-component of $12\, m$ and a $y$-component of $8\, m$. It is then rotated in the $x-y$ plane so that its $x$-component is halved. Then ifs new $y$-component is approximately

Which of the two (i) compressing a gas isothermally until its volume is reduced by half (ii) compressing the same gas adiabatically until its volume is reduced by half, will require more work to be done?

Boron is unable to form $BF _{6}^{3}$ because of

For an ideal system at thermal equilibrium, the velocity distribution of the constituent particles will be governed by

An electron and a proton, both having the same kinetic energy, enter a region of uniform magnetic field, in a plane perpendicular to the field. If their masses are denoted by $m_{e}$ and $m_{p}$ respectively, then the ratio of the radii (electron to proton) of their circular orbits is

The probability that atleast one of the events $A$ and $B$ occurs is $ 0.5 $ . If $A$ and $B$ occur simultaneously with probability $ 0.2, $ then $ P({{A}^{c}})+P({{B}^{c}}) $ is equal to

Let $ f(x)=\frac{k}{1+{{x}^{2}}},\,-\infty < x < \infty $ be the probability density of a random variable. Then, $k$ equals to

The sum of $n$ terms of the series $ \frac{3}{{{1}^{2}}{{.2}^{2}}}+\frac{5}{{{2}^{2}}{{.3}^{2}}}+\frac{7}{{{3}^{2}}{{.4}^{2}}}+..... $ is equal to

What is the resonance frequency of a driven $LCR$ oscillator?

A cheetah, weighing $150 \,kg$, chases a deer, weighing $30 \, kg$, in a straight path. The speed of the cheetah is $20 \,m / s$ and that of the deer is $25 m / s$. The approximate speed of the centre of mass of the pair is

According to Le-Chatelier's principle, the equilibrium constant of a reversible reaction will not shift by

Internodes elongation is due to

If $ f(x)=\int_{1}^{x}{\sqrt{4-{{t}^{2}}}}\,\,\,dt, $ then real roots of the equation $ x-f'(x)=0 $ are

During spontaneous discharge of an electrochemical cell Gibb's free energy will

For an electrophilic aromatic substitution reaction

Consider a copper wire of length $L$, cross-sectional area $A$. It has $n$ number of free electrons per unit volume. Which of the following is the correct expression of drift velocity of the electrons when the wire carries a steady current $I$?

Mannitol is stored in

Which logic gate does the following truth table represent?

The two organisms which breathe only through their moist skin are

The stages between larval moults in an insects are called

Phenotypic and genotypic ratio is similar in case of

Mannitol is a stored food material found in members of which of the following classes?

Which of the following is the ultimate source of energy in an ecosystem?

Which of the following belongs to the class- Gastropoda?

Which of the following animals is a reptile?