List of top Physics Questions

A stone is dropped from a height of 45 m. What is the time taken for the stone to reach the ground?
What is the focal length of a lens if its power is \( +2 \, \text{D} \)?
What is the resistance of a conductor if the potential difference across it is 12 V and the current flowing through it is 3 A?
A body of mass 10 kg is moving with a velocity of 20 m/s. What is the kinetic energy of the body?
A body of mass 5 kg is moving with a velocity of 15 m/s. What is its momentum?
A body is thrown vertically upwards with an initial velocity of \( 10 \, \text{m/s} \). How high will the body rise? (Take \( g = 10 \, \text{m/s}^2 \))
A parallel plate capacitor has a capacitance of \( 4 \, \mu\text{F} \). If the dielectric constant of the material between the plates is \( 5 \), what will be the new capacitance?
What is the wavelength of a sound wave with a frequency of \( 500 \, \text{Hz} \) in air? (Take the speed of sound in air as \( 340 \, \text{m/s} \))
A ball is dropped from a height of 20 m. What is its velocity just before hitting the ground? (Take \( g = 9.8 \, \text{m/s}^2 \))
A force of \( 10 \, \text{N} \) acts on a body of mass \( 2 \, \text{kg} \). What is the acceleration of the body?
The energy of a photon is \(6.6 \times 10^{-19} \, \text{J}\). What is the frequency of the photon?
(Take Planck’s constant \(h = 6.6 \times 10^{-34} \, \text{Js}\))
A ray of light strikes a plane mirror at an angle of incidence \(30^\circ\). What is the angle between the incident ray and the reflected ray?
Two point charges \(+2 \, \mu\text{C}\) and \(-2 \, \mu\text{C}\) are placed 0.1 m apart in air. What is the electrostatic force between them?
A gas expands from volume \(V\) to \(2V\) at constant pressure \(P\). What is the work done by the gas?
A block of mass \(2\, \text{kg}\) is placed on a smooth horizontal surface. A force of \(10\, \text{N}\) is applied horizontally on the block. What is the acceleration of the block?
Which of the following gases has the highest rate of diffusion?
A particle moves with a constant speed of 4 m/s in a circular path of radius 2 m. What is its centripetal acceleration?
A simple pendulum of length 1 m is oscillating with an amplitude of 0.1 m. What is the maximum tension in the string if the mass of the bob is 0.2 kg? (Assume \( g = 10 \, \text{m/s}^2 \))
A body of mass 2 kg is moving with a velocity of 10 m/s. What is its kinetic energy?
A capacitor of capacitance 5 \(\mu\)F is charged to 100 V and then connected to an uncharged capacitor of 2 \(\mu\)F. What is the final potential difference across the capacitors?
A convex lens has focal length 20 cm. An object is placed at a distance of 40 cm from the lens. What is the position of the image formed?
A particle moves in a circle of radius 2 m with a speed of 6 m/s. What is the centripetal acceleration of the particle?
Two identical bodies of mass 1 kg each are moving towards each other with velocities of 5 m/s and 3 m/s, respectively. They collide elastically. What will be the velocity of the body initially moving at 5 m/s after the collision?
A coil of resistance 10 \( \Omega \) is connected to a battery of 12 V. If the current flowing through the coil is 2 A, what is the power dissipated in the coil?
Which of the following is the correct unit for electric charge?