List of top Physics Questions asked in COMEDK UGET

Two spherical black bodies of radii $r_1$ and $r_2$ at temperatures $T_1$ and $T_2$ respectively, radiate same power. Then $\frac{r_1}{ r_2}$ must be equal to
A constant force acts on two different masses independently producing accelerations $a_1$ and $a_2$. When the same force acts on their combined mass, the acceleration produced is
The magnitude of the magnetic force on a charge is zero when
The most stable particle in Baryon group is
A wire of resistance 5 ohms is stretched such that longitudinal strain is $200 \%$.The new resistance in ohms is
A slit of width 0.1 mm is illuminated normally d by light of $\lambda = 5000 \mathring A $. Diffraction bands are observed on a screen, 1 m away from the slit. Third dark band is at a distance x from the central maximum. x is approximately
At the instant, when potentiometer is balanced, current
A conducting sphere of radius R carrying charge +Q is connected to an uncharged conducting sphere of radius 2R. The charge that flows between them is
Lateral shift produced by a glass slab is X. When the slab is immersed in a liquid, for the same incident ray lateral shift produced will be
In Sommerfeld's atomic model, corres ponding to principal quantum number $n = 3$, there will be
Diameter of $8^{th}$ dark ring in Newton's rings system viewed normally in reflected light of wavelength $5000 \mathring A $ is 4 mm. Radius of curvature of convex surface in contact with the glass plate is
When a thin transparent plate of refractive index 1.5 is introduced in the path of one of the interfering beams, 20 fringes shift. If the plate is replaced by another plate of refractive index 1.6 and half the thickness, the number of fringes that are displaced is
Rise of the oil in the wick of a lampis due to
Air is blown .between .two suspended balls. Then
Escape velocity for 'a projectile at Earth's surface is v,. A body is projected from earth's surface with velocity $2v_e$. The velocity of the body when it is at infinite distance from the centre of the Earth is
A heating coil takes 6 min to boil certain amount of milk. Another heating coil takes 3 min to boil same amount of milk. Supply voltage is same. When the coils are connected in parallel, time taken to boil same amount of milk is
The insulation property of air breakdown is $3 \times 10^6 V/m$. Maximum charge in coulomb that can be given to a sphere of radius 10 cm is approximately
Mass defect in a fusion reaction is 0.36%. Energy liberated when 1 gm of material undergoes fusion in kWh is
A particle is projected with a velocity so that height attained becomes equal to the radius of the earth. Then the velocity is
Magnetic moment of deuteron is
Curie temperature is the temperature above which
A step up transformer has turns ratio $10 : 1$. A source of emf 2 volts is fed to the primary. Secondary voltage developed is
A number of capacitors labelled as $8 \, \mu F, 250 \, V$ are given. Minimum number of capacitors needed to get an arrangement equivalent to $10 \, \mu F, 1000 \, V$ is
The material used in the manufacture of cooker must have (k - coefficient of thermal conductivity, s - specific heat of material used)
A high resistance voltmeter connected across a cell reads 2 volts. When a resistance of $19 \, \Omega$ is connected in the cell circuit, voltmeter reading drops to $1.9$ volts. The internal resistance of the-cell is