List of top Physics Questions asked in COMEDK UGET

Work done in moving a charge of 25 C is 50 J. Calculate the potential difference between two points.
The formula of capacitative reactance is
Which of the following quantity represents the dimensions of momentum?
For the same resonant frequency, if \( L \) is changed from \( L \) to \( \frac{L}{3} \), then capacitance should change from \( C \) to
The displacement \( x \) of a particle varies with time \( t \), \( x = ae^{-pt} + be^{qt} \), where \( a, b, p, q \) are positive constants. The velocity of the particle will
Two converging lenses of focal length 20 cm and 40 cm are placed in contact. The effective power of the combination is
The angle of projection with the horizontal in terms of maximum height attained and horizontal range is given by
In an adiabatic process with the ratio of two specific heat, \( \gamma = \frac{3}{2} \), pressure is increased by \( \frac{2}{3} \% \), then decrease in the volume will be
Insulators can be charged by which of the following process?
A $2\,kg$ mass lying on a table is displaced in the horizontal direction through $50\,cm$. The work done by the normal reaction will be
A equiangular glass prism of refractive index 1.6 is kept fully immersed in water of refractive index 4/3, for a certain ray of monochromatic light.What is the closest value for the angle of minimum deviation of the light ray in this setup? (Take sine 37 = 0.6)
A uniform chain of length $L$ is lying partly on a table, the remaining part hanging down from the edge of the table. If the coefficient of friction between the chain and the table is $0.5$, what is the minimum length of the chain that should lie on the table, to prevent the chain from slipping down to the ground?
All lights are switched off, except for a bright point-light source kept at the bottom of a swimming pool filled with clear water of refractive index $4/3$. As a result, only a circular patch of $6\, m$ diameter of the water surface is visible to spectators standing around the swimming pool. Which of the following gives the nearest value of the depth of the pool?
A message signal of frequency $10\, kHz$ and peak value of $10\,volts$ is used to moderate a carrier of frequency $1 \,MHz$ and peak voltage $20 \, volts$. The modulation index and side bands produced are
Under a constant pressure head, the rate of flow of orderly volume flow of liquid through a capillary tube is $V$. If the length of the capillary is doubled and the diameter of the bore is halved, the rate of flow would become
The mean or average value of $AC$ over a complete cycle is
A person sitting firmly over a rotating stool has his arms stretched. If he folds his arms, his angular momentum about the axis of rotation
The wireless communication frequency bands for Cellular Mobile Radio (mobile to base station) are in range of
A $10\,kg$ collar is attached to a spring (spring constant $600\, N/m$), it slides without friction over a horizontal rod. The collar is displaced from its equilibrium position by $20\,cm$ and released. What is the speed of the oscillation?
The dimensions of four wires of the same material are given below. In which wire the increase in length will be maximum when the same tension is applied?
A nuclear fission is said to be critical when multiplication factor or $K$
A mass $M$ is suspended from a light spring. An additional mass $m$ added displaces the spring further by a distance $X$. Now the combined mass will oscillate on the spring with period
A concave mirror gives an image three times as large as its object placed at a distance of $20\, cm$ from it. For the image to be real, the focal length should be
The average energy of molecules in a sample of oxgen gas at $ {300 \, K}$ are $ {6.21 \times 10^{-21} \, J}$. The corresponding values at $ {600\, K}$ are
A particle $A$ has charge $+q$ and particle $B$ has charge $+4q$, each of them having the same mass $m$. When allowed to fall from rest through the same? electrical potential difference, the ratio of their speeds will become