List of top Physics Questions asked in KEAM

In amplitude modulation, the bandwidth is
A simple pendulum is taken from the equator to the pole. lts period
If the mass of moon is $ \frac{1}{90} $ of earths mass, its radius is $ \frac{1}{3} $ of earths radius and if $ g $ is acceleration due to gravity on earth, then the acceleration due to gravity on moon is ...... :
In an L-C-R series AC circuit, if $\omega_0$ is the resonant angular frequency, then the quality factor (Q-factor) is given by
Two stretched strings of same material are vibrating under same tension in fundamental mode. The ratio of their frequencies is 1 : 2 and ratio of the length of the vibrating segments is 1 : 4. Then the ratio of the radii of the strings is
In the measurement of the angle of a prism using a spectrometer, the readings of first reflected image are Vernier $I : 320^\circ 40';$ Vernier $ II : 140^\circ 30' $ and those of the second reflected image are Vernier $ I : 80^\circ 38'; $ Vernier $ II : 260^\circ 24'.$ Then the angle of the prism is
Electric lines of force about a positive point charge are
Electrical conductivity is the reciprocal of
When the angle of incidence on a material is 60$^{\circ}$, the reflected light is completely polarized. The velocity of the refracted ray inside the material is (in $ms^{-1}$)
Two blocks of masses 7 kg and 5 kg are placed in contact with each other on a smooth surface. lf a force of 6 N is applied on the heavier mass, the force on the lighter mass is
According to the work-energy theorem, the work done by the net force on a particle is equal to the change in its
Identify the wrong statement from the following
Two identical spheres of radius $R$ made of the same material are kept at a distance $d$ apart. Then the gravitational attraction between them is proportional to
Two identical magnetic dipoles of magnetic moment $2\, A\, m^2$ are placed at a separation of $2\, m$ with their axes perpendicular to each other in air. The resultant magnetic field at a midpoint between the dipoles is
Two plane wavefronts of light, one incident on a thin convex lens and another on the refracting face of a term prism. After refraction at them, the emerging wavefronts respectively become
A slit of width a is illuminated by red light of wavelength $ 6500\, \overset{\text{o}}{\mathop{\text{A}}}\, $ . If the first minimum falls at $ \theta =30{}^\circ , $ the value of $ a $ is
Three bricks each of length $L$ and mass $M$ are arranged as shown from the wall. The distance of the centre of mass of the system from the wall is
Dimensional formula of Stefan's constant is
Five cells each of emf $E$ and internal resistance $r$ send the same amount of current through an external resistance $R$ whether the cells are connected in parallel or in series. Then the ratio $\left( \frac{R}{r} \right)$ is
Two equal forces are acting at a point with an angle of 60$^{\circ}$ between them. If the resultant force is equal to $40\sqrt{3}$, the magnitude of each force is
From a balloon is moving Upwards with velocity $12\, ms^{-1}$. It releases a packet when it is at a height of $65\,m$ from the ground. How much time the packet will take to reach the ground $\left(g=10m/sec^2\right)$
In the circuit shown, the current through the $ 5\,\Omega $ resistor is
In a meter bridge experiment, resistances are connected as shown in figure. The balancing length $ l_1 $ is 55 cm. Now an unknown resistance x is connected in series with P and the new balancing length is found to be 75 cm . The value of x is
Two identical conductors maintained at different temperatures are given potential differences in the ratio 1 : 2. Then the ratio of their drift velocities is
On increasing the temperature of a conductor. its resistance increases because the