List of top Questions asked in COMEDK UGET

A mass of 0.1 kg is hung at the 20 cm mark from a 1 m rod weighing 0.25 kg pivoted at its centre. The rod will not topple if
Two point charges $Q_1 = 2 \mu C$ and $ Q_2 = 1 \mu C$ are placed as shown. The coordinates of the point P are (2 cm, 1 cm). The electric intensity vector at P subtends an angle $\theta$ with the positive X-axis. The value of $\theta$ is given by
An electron having spin quantum number, $s = -1/2$ and magnetic quantum number, $m = + 3$ can be present in
A particle is moving eastward with velocity $5 \, m \, s^{-1}$ In 10 s the velocity changes to $5\, m\, s^{-1}$ northwards. The average acceleration in this time is
Two ions $A^+$ and $B^-$ have radii 104 and 200 pm respectively, in a cubic close packed crystal of compound AB. The co-ordination no. of A is
The layer in earth's atmosphere which reflects radio waves from the earth thus, helping radio communication is
The ratio of speed of sound in Hydrogen to that in Oxygen at the same temperature is
A glass hemisphere of radius 0.1 cm and refractive index 1.5 is placed over a spot on a table and the spot is viewed from above. The spot appears to be
In the case of the Bohr atom model, if $E_k$ and $U$ are the kinetic and potential energies of an electron in an orbit then,
According to Faraday's law of electromagnetic induction, an emf is induced in a coil if
"Plum pudding" model of an atom was proposed by
The value of $\tan 10^{\circ}\, \tan 20^{\circ} \, \tan 30^{\circ} \, \tan 40^{\circ} \, \tan 50^{\circ}\, \tan 60^{\circ} \tan 70^{\circ} \, \tan 80^{\circ} =$
The ionisation constant of phenol is higher than that of ethanol because
The carrier of electromagnetic interaction is
The mole fraction of benzene in a solution containing 39% by mass in an organic solvent of molecular mass 122 is
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
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 $\otimes_7$ ?
The multiplicative inverse of $ \frac{3 + 4i}{4 - 5 i}$ is
Identify the false statement
The parametric equation of a parabola is $x = t^2 + 1, y = 2t + 1$. The cartesian equation of its directrix is
Assuming $g_{(moon)} = \left( \frac{1}{6}\right) g_{earth}$ and $D_{(moon)} = \left( \frac{1}{4}\right) D_{earth}$ where g and D are. the acceleration due to gravity and diameter respectively, the escape velocity from the moon is
The rate equation of a gaseous reaction is given by, $r = k[A][B]$. If the volume of reaction vessel is suddenly reduced to half of the initial volume, the reaction rate relating to the original rate will be