List of top Physics Questions asked in KEAM

Two planets revolve around the sun in elliptical orbits with their major axes in the ratio 2 : 3. Their periods of revolution around the sun are in the ratio
Two masses 2 kg and 6 kg lie on the x-axis at distances of 3 m and 6 m, respectively, from the origin. The distances of the centre of mass of the system from the origin and from the 2 kg mass are in the ratio
A thin circular disc and a uniform thin circular ring have their masses and radii in the ratio 2 : 1 and 1 : 2 respectively. The ratio of their moments of inertia about their respective diameters is
The terminal velocity of a steel ball of radius r and density \(\rho\) falling through an oil column of density \(\sigma\) and viscosity \(\eta\) is
The values of the acceleration due to gravity at depths of \(\frac{R}{2}\) and \(\frac{2R}{3}\) from the surface of the earth are in the ratio
A steel rod of 1 m length and 10\(^{-3}\) m\(^2\) area of cross section is subjected to a linear force of 150 kN. The elongation of the rod is (Young’s modulus of steel \(1.5 \times 10^{11} \text{ Nm}^{-2}\))
A batsman hits a cricket ball of mass 0.15 kg travelling at a speed of 54 kmph. The ball reverses its direction. The impulse imparted to the ball in kgms\(^{-1}\) is
The position of an object moving along the x axis is given by the equation \(x = 1 + t^2\) (\(x\) in meter and \(t\) in second). At what time will the magnitude of its displacement and velocity be equal?
A particle projected with a velocity at an angle of \(30^\circ\) to the horizontal, travels a horizontal range R. If it is projected with the same velocity at \(60^\circ\) to the horizontal, its horizontal range will be
A body of mass 2 kg at rest starts to move under the action of an applied horizontal force of 7 N on a table with coefficient of kinetic friction, 0.1. The kinetic energy of the body in 10 seconds is (\(g = 10 \text{ ms}^{-2}\))
A bullet of mass 0.05 kg entering a heavy wooden block with a speed of 100 ms\(^{-1}\) is stopped in a distance of 50 cm. The average resistive force exerted by the block on the bullet is
A car moves at a speed of 72 kmph, under a force of 600 N. The power output of the car is
A particle starting with an initial velocity \(2 \text{ ms}^{-1}\) moves with a uniform linear acceleration \(2 \text{ ms}^{-2}\). The particle velocities at the end of the 5 seconds and 10 seconds of its motion from the start, are in the ratio
Which of the following is not the unit of pressure ?
For a given mass m, linear velocity v, linear displacement s, linear acceleration a and time t, the dimensionally INCORRECT expression for power P is
Four ideal diodes are connected as shown then the current drawn from the battery is
If a radioactive parent nucleus \({}^{236}_{94}X\) emits two alpha particles and two \(\beta\) particles successively to reach the daughter nucleus \({}^{a}_{b}Y\), then the values of \(a\) and \(b\) are
The difference in magnitudes of angular momentum of the electrons revolving in \(5^{\text{th}}\) Bohr’s orbit and \(3^{\text{rd}}\) Bohr’s orbit of hydrogen atom is
Intrinsic semiconductors Ge or Si doped with
The fringe width obtained in a given Young’s double slit experimental set up for red light, blue light and green light are, respectively, $\beta_R$, $\beta_B$ and $\beta_G$. Then
Microwaves are
The magnifying power of a telescope of length $76$ cm in the normal adjustment is $75$. Then the focal lengths of the objective and eyepiece lenses are, respectively,
Two identical transformers \(A\) and \(B\) each with \(\dfrac{N_p}{N_s} = 2\) are connected such that the secondary output obtained from \(A\) is given as the primary input voltage for \(B\). If the primary ac voltage of \(A\) is \(200\) V, then the secondary voltage from \(B\) is
An object placed at $10$ cm in front of a concave mirror of focal length $8$ cm gives image of magnification of
A wire of length $4$ m carrying a current of $1$ A is bent to form a circular loop. The magnetic moment of the loop (in A m$^2$) is