Physics questions
20027 published questions with worked solutions.
- If speed (V), acceleration (A) and force (F) are considered as fundamental units, the dimension of Young's modulus will be:
- A copper wire is wound on a wooden frame, whose shape is that of an equilateral triangle. If the linear dimension of each side of...
- The magnitude of torque on a particle of mass 1 kg is 2.5 Nm about the origin. If the force acting on it is 1 N, and the distance...
- A gas mixture consists of 3 moles of oxygen and 5 moles of argon at temperature T. Considering only translational and rotational...
- Ice at −20°C is added to 50 g of water at 40°C. When the temperature of the mixture reaches 0°C, it is found that 20 g of ice is...
- In a Young's double slit experiment, the path difference, at a certain point on the screen, between two interfering waves is 18th...
- A rigid diatomic ideal gas undergoes an adiabatic process at room temperature. The relation between temperature and volume for...
- In an experiment, electrons are accelerated, from rest, by applying a voltage of 500 V. Calculate the radius of the path if a...
- An object is at a distance of 20 m from a convex lens of focal length 0.3 m. The lens forms an image of the object. If the object...
- If the de Broglie wavelength of an electron is equal to 10^ -3 times the wavelength of a photon of frequency 6 10^ 14 Hz, then...
- A particle is moving along a circular path with a constant speed of 10 ms^ -1 . What is the magnitude of the change in velocity...
- The force of interaction between two atoms is given by F = (- x^2 kT ); where x is the distance, k is the Boltzmann constant and...
- Two equal resistances when connected in series to a battery, consume electric power of 60 W. If these resistances are now...
- A body is projected at t = 0 with a velocity 10 ms^ -1 at an angle of 60° with the horizontal. The radius of curvature of its...
- Equation of travelling wave on a stretched string of linear density 5 g/m is y = 0.03 sin(450t − 9x) where distance and time are...
- An electromagnetic wave of intensity 50 Wm^ -2 enters in a medium of refractive index 'n' without any loss. The ratio of the...
- A closed organ pipe has a fundamental frequency of 1.5 kHz. The number of overtones that can be distinctly heard by a person with...
- A metal plate of area 1 10^ -4 m^2 is illuminated by a radiation of intensity 16 mW/m^2. The work function of the metal is 5 eV....
- A current of 2 mA was passed through an unknown resistor which dissipated a power of 4.4 W. Dissipated power when an ideal power...
- Two stars of masses 3 10^ 31 kg each, and at distance 2 10^ 11 m rotate in a plane about their common centre of mass O. A...