List of top Questions asked in COMEDK UGET

If $ \theta_1 $ and $ \theta_2 $ be the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip $ \theta $ is given by
A car starts from rest and accelerates uniformly to a speed of 180 km/h in 10 s. The distance covered by the car in this time interval is
A body is projected vertically upwards. The times corresponding to height $ h $ while ascending and while descending are $ t_1 $ and $ t_2 $, respectively. Then, the velocity of projection will be (take $ g $ as acceleration due to gravity)
An LED is constructed from a p-n junction diode using GaAsP. The energy gap is 1.9 eV. The wavelength of the light emitted will be equal to
In the case of an inductor,
In Young's double slit experiment, the ratio of maximum and minimum intensities in the fringe system is 9:1. The ratio of amplitudes of coherent sources is
The first emission of hydrogen atomic spectrum in Lyman series appears at a wavelength of
The wavelength of the first line of Lyman series for H-atom is equal to that of the second line of Balmer series for a H-like ion. The atomic number $ Z $ of H-like ion is
In Young's double slit interference experiment, using two coherent waves of different amplitudes, the intensity ratio between bright and dark fringes is 3. Then, the value of the ratio of the amplitudes of the waves that arrive there is
If escape velocity on Earth surface is 11.1 km/h$^{-1}$, then find the escape velocity on the Moon surface. If the mass of the Moon is $ \frac{1}{81} $ times the mass of the Earth and the radius of the Moon is $ \frac{1}{4} $ times the radius of Earth.
The magnetic flux linked with a coil satisfies the relation $ \phi = (4t^2 + 6t + 9) \, \text{Wb} $, where $ t $ is time in seconds. The emf induced in the coil at $ t = 2 $ seconds is
A dielectric of dielectric constant $ K $ is introduced such that half of its area of a capacitor of capacitance $ C $ is occupied by it. The new capacity is
Two wires are made of the same material and have the same volume. The first wire has cross-sectional area $ A $ and the second wire has cross-sectional area $ 3A $. If the length of the first wire is increased by $ \Delta l $ on applying a force $ F $, how much force is needed to stretch the second wire by the same amount?
The gases carbon monoxide (CO) and nitrogen at the same temperature have kinetic energies $ E_1 $ and $ E_2 $, respectively. Then,

A gas is taken through the cycle $ A \to B \to C \to A $, as shown in the figure. What is the net work done by the gas?

In the figure, pendulum bob on the left side is pulled aside to a height $ h $ from its initial position. After it is released, it collides with the right pendulum bob at rest, which is of the same mass. After the collision, the two bobs stick together and rise to a height

Two wires of the same material having radius in ratio 2 : 1 and lengths in ratio 1 : 2. If the same force is applied on them, then the ratio of their change in length will be

An air bubble in water ($ \mu = \frac{4}{3} $) is shown in the figure. The apparent depth of the image of the bubble in a plane mirror viewed by the observer is.

The mass density of a nucleus varies with mass number $ A $ as

Which of the following complex show optical isomerism?
$(i) \text{cis} - [\text{COCl}(\text{en})_2 (\text{NH}_3)]^{2+} $ 
$(ii) \text{cis} - [\text{CrCl}_2(\text{ox})_2]^{3-}$ 
$(iii) \text{cis} - [\text{CO}(\text{en})_2\text{Cl}_2]\text{Cl}$ 
$(iv) \text{cis} - [\text{CO}(\text{NH}_3)_4 \text{Cl}_2]^+$

Aqueous CuSO$_4$ changes its colour from sky blue to deep blue on addition of NH$_3$ because
Abnormal colligative properties are observed only when the dissolved non-volatile solute in a given dilute solution
If 2 moles of $ C_6H_6 $ (g) are completely burnt 4100 kJ of heat is liberated. If $ \Delta H^\circ $ for $ CO_2 (g) $ and $ H_2O (l) $ are -410 kJ and -285 kJ per mole respectively then the heat of formation of $ C_6H_6 (g) $ is
At 300 K, the half-life period of a gaseous reaction at an initial pressure of 40 kPa is 350 s. When pressure is 20 kPa, the half-life period is 175 s. What is the order of the reaction?
Bohr's radius of 2nd orbit of $ \text{Be}^{3+} $ is equal to that of