List of top Physics Questions

Water flows through a horizontal pipe with a velocity of 2 m/s. The cross-sectional area of the pipe reduces to half. What is the velocity of water in the narrower section?
The wavelength of a photon is 500 nm. Calculate its energy. (Planck’s constant \( h = 6.63 \times 10^{-34} \, \text{J·s} \), speed of light \( c = 3 \times 10^8 \, \text{m/s} \))
A solid sphere of mass 2 kg and radius 0.5 m rolls without slipping down an inclined plane of height 3 m. What is its speed at the bottom? (Take \( g = 9.8\, \text{m/s}^2 \))
A wire of length 0.5 m carrying a current of 3 A is placed in a magnetic field of 2 T perpendicular to the wire. What is the force on the wire?
A light wave of wavelength 600 nm passes from air into a medium with refractive index 1.5. What is the wavelength of light in the medium?
An ideal gas expands from 2 L to 6 L at a constant temperature of 300 K. Calculate the work done by the gas if pressure remains constant at 2 atm. (1 atm = $1.013 \times 10^5$ Pa)
How much heat is required to raise the temperature of \( 2 \, \text{kg} \) of water from \( 25^\circ C \) to \( 75^\circ C \)? (Specific heat capacity of water \( c = 4200 \, \text{J/kg}^\circ C \))
A projectile is launched with an initial velocity of \( 20 \, \text{m/s} \) at an angle of \( 30^\circ \) with the horizontal. What is the maximum height reached by the projectile? (Take \( g = 10 \, \text{m/s}^2 \))
A convex lens has a focal length of 10 cm. What is the magnification produced when the object is placed 30 cm from the lens?
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?
The potential energy of a body at a height of 10 meters is 200 J. What is its mass? (Take \( g = 10 \, \text{m/s}^2 \))
A body of mass 10 kg is moving with a speed of 5 m/s. What is the momentum of the body?
A current of 2 A flows through a resistor for 10 minutes. What is the total charge that flows through the resistor?
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 D?
A bulb rated 60 W operates for 2 hours. How much energy does it consume in this time?
A body of mass 2 kg is moving with a velocity of 3 m/s. What is its kinetic energy?
A projectile is fired at an angle of \( 30^\circ \) with an initial velocity of \( 40 \, \text{m/s} \). What is the range of the projectile? Assume \( g = 9.8 \, \text{m/s}^2 \).
A ball is thrown vertically upwards with a speed of \( 20 \, \text{m/s} \). What is the maximum height reached by the ball? Assume the acceleration due to gravity is \( g = 9.8 \, \text{m/s}^2 \).
A car is moving along a straight road with a constant velocity of 20 m/s. The driver applies the brakes, and the car decelerates at a constant rate of \(4 \, \text{m/s}^2\). How much time will it take for the car to come to rest?
A convex lens has a focal length of 10 cm. What is the magnification produced when the object is placed 30 cm from the lens?
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?
The potential energy of a body at a height of 10 meters is 200 J. What is its mass? (Take \( g = 10 \, \text{m/s}^2 \))
A body of mass 10 kg is moving with a speed of 5 m/s. What is the momentum of the body?
A current of 2 A flows through a resistor for 10 minutes. What is the total charge that flows through the resistor?