List of top Physics Questions asked in KEAM

A carpet of mass $m$ made of inextensible material is rolled along its length in the form of a cylinder of radius $r$ and kept on a rough floor. The decrease in the potential energy of the system, when the carpet is unrolled to a radius $\frac{r}{2}$ without sliding is $(g=$ acceleration due to gravity)
The electric potential V at any point $(x, y, z)$ in space is given by $V = 3x^{2}$ where $x, y, z$ are all in metre. The electric field at the point (1 m, 0, 2 m) is
The graph between displacement and time for a particle moving with uniform acceleration is a
The radius of gyration of a solid cylinder of mass $M$ and radius $R$ about its own axis is
The shunt resistance required to allow $4\%$ of the main current through the galvanometer of resistance $48 \, \Omega$ is
The simple harmonic vibrations of two particles are $ y_{1} =5$ sin (100$t$) and $y_{2} =4 $ cos $\left(100t +\frac{\pi}{4}\right).$ The phase difference between them is
The horizontal range is four times the maximum height attained by a projectile. The angle of projection is
Two cars started moving with initial velocities $v$ and $2v$. For the same deceleration, their respective stopping distances are in the ratio
The slope of the tangent drawn on position-time graph at any instant is equal to the instantaneous
The rate of change of current of $10\, A\, s^{ -1}$ in a coil produces an emf of 5 V. Then the self-inductance of the coil in henry is
The range of frequency bands used for television $VHF$ service is
The total electric flux emanating from a closed surface enclosing an $\alpha$-particle (e = electronic charge) is
The speed of sound in a gas of density $\rho$ at a pressure $P$ is proportional to
Two bodies of masses 4 kg and 5 kg are moving with equal momentum. Then the ratio of their respective kinetic energies is
Two batteries of emfs $2\, V$ and $1 \,V$ of internal resistances $1 \Omega$ and $ 2 \, \Omega$ respectively are connected in parallel. The effective emf of the combination is
A charged particle moving with veiocity $4 \times 10^6ms^{-1} $ enters perpendicuiar to a magnetic field $B=2 \, Wbm^{-2}.$ It moves in a circular path of radius 2 cm, then charge per unit mass is
The heat capacity per mole of water is ($R$ is universal gas constant)
The relation between the time of flight of projectile $T_f$ and the time to reach the maximum height $t_m$ is
$n$ identical drops, each of capacitance $C$ and charged to a potential $V$, coalesce to form a bigger drop. Then the ratio of the energy stored in the big drop to that in each small drop is
Mean free path of a gas molecule is
Identify the false statement
The set which represents the isotope, isobar and isotone respectively is
The time period of the variation of potential energy of a particle executing $SHM$ with period $T$ is
Two charged spherical conductors of radii $ {{R}_{1}} $ and $ {{R}_{2}} $ are connected by a wire. Then the ratio of surface charge densities of the spheres $ {{\sigma }_{1}}/{{\sigma }_{2}} $ is
Moment of inertia of a ring of mass $M$ and radius $R$ about a tangent to the circle of the ring is