List of practice Questions

The carrier of electromagnetic interaction is
According to Faraday's law of electromagnetic induction, an emf is induced in a coil if
The ionisation constant of phenol is higher than that of ethanol because
Which one of the following categories of animals, is correctly described with no single exception in it?
Which one of the following is the correct statement for respiration in humans?
The mole fraction of benzene in a solution containing 39% by mass in an organic solvent of molecular mass 122 is
Identify the false statement
In the group $G = \{1, 5, 7, 11\}$ under $\otimes_{12}$ the value of $7 \otimes_{12} 11^{-1}$ is equal to
Which of the following is a subgroup of the group $G = \{1, 2, 3, 4, 5, 6\}$ under $\otimes_7$ ?
Equation of chord of the circle $x^2 + y^2 + 4x - 6y - 9 = 0 $ bisected at (0, 1) is
$\displaystyle\lim_{x\to0} \left(\frac{1+5x^{2}}{1+3x^{2}}\right)^{\frac{1}{x^{2}}} = $
If $\frac{2}{9!} + \frac{2}{3! \,7!}+\frac{1}{5! \,5!} =\frac{2^{a}}{b!}$ where $a,b \in \, N$ then theordered pair $(a, b)$ is
The multiplicative inverse of $ \frac{3 + 4i}{4 - 5 i}$ is
The parametric equation of a parabola is $x = t^2 + 1, y = 2t + 1$. The cartesian equation of its directrix is
Consider a thin spherical shell of radius $R$ with its centre at the origin, carrying uniform positive surface charge density. The variation of the magnitude of the electric field and the electric potential $V (r)$ with the distance $r$ from the centre, is best represented by which graph?
A parallel plate capacitor has a uniform electric field E in the space between the plates. If the distance between the plates is d and area of each plate is A, the eneigy stored in the capacitor is
$C$ and $Si$ both have same lattice structure; having $4$ bonding electrons in each. However, $C$ is insulator where as $Si$ is intrinsic semiconductor. This is because
A proton carrying 1 MeV kinetic energy is moving in a circular path of radius R in uniform magnetic field. What should be the energy of an $\alpha$-particle to describe a circle of same radius in the same field?
Buffer solutions have constant acidity and alkalinity because
Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres
In gobar gas, the maximum amount is that of
The electric field associated with an e. $m$. wave in vacuum is given by $\vec{ E }=\hat{ i } 40 \cos \left( kz -6 \times 10^{8} t \right)$, where $E , z$ and $t$ are in volt $/ m$, meter and seconds respectively. The value of wave vector $k$ is :
Which part of the human ear plays no role in hearing as such but is otherwise very much required?
A slab of stone of area 0.36 m2 and thickness 0.1 m is exposed on the lower surface to steam at 100$^{\circ}$C. A block of ice at 0$^{\circ}$C rests on the upper surface of the slab. In one hour 4.8 kg of ice is melted. The thermal conductivity of slab is (Given latent heat of fusion of ice = $ 3.36 \times 10^5 J kg^{-1})$
The height at which the weight of a body becomes $1 / 16^{\text {th }}$, its weight on the surface of earth (radius R), is