List of top Questions asked in JKCET

Avogadro number $\left(6.023 \times 10^{23}\right)$ of carbon atoms are present in

Which of the following is true for the minimum angular separation of two stars, $\Delta \theta_{\min }$ can be resolved by a telescope? In the following aperture is the diameter of the objective

Which of the following is the correct arrangement of the electromagnetic spectrum in the increasing order of frequency ?

Which of the following laws of thermodynamics forms the basis for the definition of temperature?

The de-Broglie wavelength of a particle is

Spherical wave fronts, emanating from a point source, strike a plane reflecting surface. What will happen to these wave fronts, immediately after reflection ?

Desalination of sea water can be done by

The effective atomic number for $\left[R h\left(H_{2} O\right)_{6}\right]^{3+}$ (at. no. for $R h$ is $45$ ) is

If the product of $n$ positive real numbers is one, then their sum is

A short solenoid of radius $a$, number of turns per unit length $n_{1}$ and length $L$ is kept coaxially inside a very long solenoid of radius $b$, number of turns per unit length $n_{2}$. What is the mutual inductance of the system?

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?

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

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

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

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

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

Which of the following is the correct Kirchhoff's loop rule?

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

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

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

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