List of top Physics Questions asked in COMEDK UGET

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} $)
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
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
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?
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
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
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 telescope has an objective of focal length 60 cm and eyepiece of focal length 5 cm. The telescope is focused for least distance of distinct vision 300 cm away from the object. The magnification produced by the telescope at least distance of distinct vision is
A photon emitted during the de-excitation of electron from a state n to the second excited state in a hydrogen atom, irradiates a metallic electrode of work function 0.5 eV, in a photocell, with a stopping voltage of 0.47 V. Obtain the value of quantum number of the state 'n'.
The coefficient of volume expansion of glycerine is $ 49 \times 10^{-5} \, \text{K}^{-1} $. The percentage change in its density for a $ 50^\circ \text{C} $ rise in temperature is
Three bulbs of 40 W, 60 W, and 100 W are arranged in series with a 220 V source. The maximum light is obtained from
The acceleration due to gravity at pole and equator can be related as
A neutral water molecule is placed in an electric field $ E = 2.5 \times 10^4 \, \text{N/C} $. The work done to rotate it by 180° is $ 5 \times 10^{-25} \, \text{J} $. Find the approximate separation of the center of charges.
A cricketer of height 2.5 m throws a ball at an angle of 30° with the horizontal such that it is received by another cricketer of the same height standing at a distance of 50 m from the first one. The maximum height attained by the ball is (tan 30° = 0.577).

Figure below shows a network of resistors, cells, and a capacitor at steady state.
 
What is the current through the resistance 4 Ω?

The binding energy per nucleon for $^{12}C$ is 7.68 MeV and that for $^{13}C$ is 7.47 MeV. The energy required to remove a neutron from $^{13}C$ is
The distance of closest approach when an alpha particle of kinetic energy 6.5 MeV strikes a nucleus of atomic number 50 is
A scooter moves with a speed of 7 m/s on a straight road and is stopped by applying the brakes. Before stopping, the scooter travels 10 m. If the weight of the scooter is W, then the total resistance to the motion of the scooter will be
A spring of force constant \( k \) is cut into lengths of ratio \( 1 : 3 : 4 \). They are connected in series and the new force constant is \( k' \). Then they are connected in parallel and force constant is \( k'' \). Then \( k' : k'' \) is:
The current drawn by the primary coil of an ideal transformer, which steps up 22 V into 220 V, to operate a device having a load resistance of 110 \(\Omega\) is:
One volt induced emf is produced in the secondary coil when the current through the primary coil is changed from 3 A to 1 A in 100 milliseconds. The mutual inductance of the two coils is:
A circular loop of area 0.04 m\(^2\) carrying a current of 10 A is held with its plane perpendicular to a magnetic field induction of 0.4 T. Then the torque acting on the circular loop is:
A neutron makes a head-on elastic collision with a lead nucleus. The ratio of nuclear mass to neutron mass is 206. The fractional change in kinetic energy of a neutron is: