List of top Questions asked in COMEDK UGET

A negative charge particle is moving upward in a magnetic field which is towards north. The particle is deflected towards
A current $ I $ flows in an infinitely long wire with cross section in the form of semi-circular ring of radius 1 m. The magnitude of the magnetic induction along its axis is

A parallel plate capacitor having a dielectric constant 5 and dielectric strength $10^6 \, \text{V/m}$ is to be designed with a voltage rating of 2 kV. The field should never exceed 10% of its dielectric strength. To have the capacitance of 60 pF, the minimum area of the plates should be

If an electron in a hydrogen atom jumps from the third orbit to the second orbit, it emits a photon of wavelength $ \lambda $. When it jumps from the second to the first orbit, the corresponding wavelength of the photon will be:

Arrange the following redox couples in the increasing order of their reducing strength:
Cu$^{2+}$/Cu$^{+}$ $E^\circ = -0.34$ V
Ag$^+$/Ag $E^\circ = -0.8$ V
Ca$^{2+}$/Ca  $E^\circ = +2.87$ V
Cr$^{3+}$/Cr$^{2+}$  $E^\circ = +0.74$ V

Match the Vitamins given in Column I with the diseases caused by their deficiency as given in Column II.

The following are the graphs of potential barrier versus width of the depletion region for a p-n junction diode.

Which of the following is correct?

For a paramagnetic material, the dependence of the magnetic susceptibility $ \chi $ on the absolute temperature is given as
A hollow prism is filled with water and placed in air. It will deviate the incident rays

The output of the given circuit is

Action and reaction can never balance out because
The current in a coil changes steadily from 3 A to 5 A in 0.2 s when an emf of 2 $\mu$V is induced in it. The self-inductance of the coil is

A body initially at rest undergoes rectilinear motion. The force-time (F-t) graph for the motion of the body is given below. Find the linear momentum gained by the body in 2 s.

Internal energy of $n_1$ moles of hydrogen at temperature $T$ is equal to internal energy of $m_2$ moles of helium at temperature $2T$. The ratio $ \frac{n_1}{n_2} $ is
A monochromatic light of wavelength 800 nm is incident normally on a single slit of width 0.020 mm to produce a diffraction pattern on a screen placed 1 m away. Estimate the number of fringes obtained in Young's double slit experiment with slit separation 0.20 mm, which can be accommodated within the range of total angular spread of the central maximum due to single slit.
A voltmeter of resistance $1000 \, \Omega $ and $0.5 \, \text{V/div} $ is to be converted into a voltmeter to make it read $1 \, \text{V/div} $. The value of high resistance to be connected in series with it is
Joule second is the unit of
A particle of mass 2 mg has the same wavelength as a neutron moving with a velocity of $ 3 \times 10^5 \, \text{ms}^{-1} $. The velocity of the particle is (mass of neutron is $ 1.67 \times 10^{-27} \, \text{Kg} $)
A body is executing SHM. When its displacements from the mean position are 4 cm and 5 cm, it has velocity 10 cm/s and 8 cm/s respectively. Its periodic time $ t $ is
An electron has a mass of $ 9.1 \times 10^{-31} \, \text{kg} $. It revolves round the nucleus in a circular orbit of radius $ 0.529 \times 10^{-10} \, \text{m} $ at a speed of $ 2.2 \times 10^6 \, \text{m/s} $. The magnitude of its angular momentum is
If the nuclear radius of $^{27}Al$ is 3.6 fermi, the nuclear radius of $^{125}Fe$ is
The dimension $ [ML^{-1} T^{-2}] $ is the physical quantity of
When water falls from a height of 80 m at the rate of 20 kg s$^{-1}$ to operate a turbine the losses due to frictional force are 20% of input energy. How much power is generated by the turbine?
A conducting circular loop is placed in a uniform magnetic field $ B = 0.125 \, \text{T} $ with its plane perpendicular to the loop. If the radius of the loop is made to shrink at a constant rate of 2 mm/s, then the induced emf when the radius is 4 cm is:
A bar magnet is held perpendicular to a uniform field. If the couple acting on the magnet is to be halved, by rotating it, the angle by which it is to be rotated is