List of top Physics Questions

Which of the following statements are true about acceleration due to gravity \( g \)?
A. \( g \) is greater at poles.
B. \( g \) decreases with height.
C. \( g \) is same all over Earth.
D. \( g \) is maximum at centre of Earth.
A satellite is plad in a circular orbit around the earth at an altitude of 1000 km. The time period of the satellite in minutes is approximately (mass of the earth $= 6 \times 10^{24}$ kg, radius of the earth $= 6.4 \times 10^6$ m, $G = 6.67 \times 10^{-11}$ Nm$^2$kg$^{-2}$)
In Young's double slit interference experiment, using two coherent waves of different amplitudes, the intensity ratio between bright and dark fringes is 3. Then, the value of the ratio of the amplitudes of the waves that arrive there is
In Young's double slit experiment, the ratio of maximum and minimum intensities in the fringe system is 9:1. The ratio of amplitudes of coherent sources is
With what velocity should an observer approach a stationary sound source, so that the apparent frequency of sound should appear double the actual frequency?
A car is moving towards a high cliff. The car driver sounds a horn of frequency $ f $. The reflected sound heard by the driver has a frequency $ 2f $. If $ v $ be the velocity of sound, then the velocity of the car in the same velocity units will be
The equation of a stationary wave is \( y = 20 \sin(\pi x) \cos(\omega t) \), where \( x, y \) are in metre and \( t \) is in second. The distance between a node and its adjacent antinode is:
The ratio of intensities at two points \( P \) and \( Q \) on the screen in a Young's double-slit experiment, where the phase difference between two waves of the same amplitude are \( \frac{\pi}{3} \) and \( \frac{\pi}{2} \), respectively, is:
Why did the time period of rotation of Earth decrease by microseconds after the Japan 2011 earthquake?
Two projectiles are projected at 30° and 60° with the horizontal with the same speed. The ratio of the maximum height attained by the two projectiles respectively is :
The trajectory of projectile, projected from the ground is given by y=x-x2/20. Where x and y are measured in meter. The maximum height attained by the projectile will be
A bullet strikes a stationary ball kept at a height as shown. After collision, range of bullet is 120 m and that of ball is 30 m. Find initial speed of bullet. Collision is along horizontal direction. 
(Take g = 10 m/s2)
A bullet strikes a stationary ball kept at a height
A hockey player hits the ball at an angle of 37° from the horizontal with an initial speed of 40 m/s (a right-angled triangle with one of the angles being 37° and their sides in the ratio of 6 : 8 : 10). Assume that the ball is in a vertical plane. The time at which the ball reaches the highest point of its path is:
If a stone is projected at certain angle ‘θ’ with the horizontal such that its horizontal range is equal to its maximum height, then angle of projection ‘θ’ is
At any instant \( t \), the vertical distance \( Y \) and horizontal distance \( X \) of a projectile are given by \[ 2Y = 6t - g t^2 \quad \text{and} \quad X = 4t, \] The initial velocity of the projectile is:
The time of flight of a vertically projected stone is 8 s. The position of the stone after 6 s from the ground is
A body is projected from the ground with a speed 10 m/s at angle 30° with the horizontal. The height of the body after 5 seconds of its projection is (Acceleration due to gravity = 10 m/s²)
Two bodies of masses 12 kg and 6 kg are projected simultaneously with velocities 15 ms\(^{-1}\) and 20 ms\(^{-1}\) respectively from the top of a tower of height 25 m. The body of mass 12 kg is projected vertically upwards and the body of mass 6 kg is projected horizontally. The maximum height reached by the centre of mass of the system of two bodies from the ground is:
If the maximum range of a projectile is $R$, then the maximum height reached by the projectile is
Among the following, velocity \( v \) - time \( t \) graph representing the motion of a vertically projected body is:
Two particles of equal mass ‘m’ move in a circle of radius ‘r’ under the action of their mutual gravitational attraction. The speed of each particle will be :
Given below are two statement:
statement I : Rotation of the earth shows effect on the value of acceleration due to gravity (g).
statement II : The effect of rotation of the earth on the value of 'g' at the equator is minimum and that at the pole is maximum.
In the light of the above statements , choose the correct answer from the options given below
A car accelerate from it's Stationary position for 8 seconds and travels a distance of 280m. According to the mean value theorem, the speedometer at a certain time during accelaration must read exactly.
A truck moving at a constant speed of 72 km/h enters a curved path of radius of curvature measuring 120 m. It's total acceleration is:
Two planets \( A \) and \( B \) have radii \( R \) and \( 1.5R \), and densities \( \rho \) and \( \frac{\rho}{2} \) respectively. The ratio of acceleration due to gravity at the surface of \( B \) to \( A \) is: