Physics questions
20027 published questions with worked solutions.
- The correct relation between = C_P C_V and temperature T is :
- In a medium the speed of light wave decreases to 0.2 times to its speed in free space. The ratio of relative permittivity to the...
- The speed of a swimmer is 4 km h^ -1 in still water. If the swimmer makes his strokes normal to the flow of river of width 1 km,...
- Two identical cells, when connected either in parallel or in series gives same current in an external resistance 5 . The internal...
- An inductor of 0.5 mH, a capacitor of 20 and resistance of 20 are connected in series with a 220 V ac source. If the current is...
- A lift of mass M = 500 kg is descending with speed 2 ms^ -1 . Its supporting cable begins to slip thus allowing it to fall with a...
- A solid sphere of mass 1 kg rolls without slipping on a plane surface. Its kinetic energy is 7 10^ -3 J. The speed of the centre...
- A thin rod having a length of 1 m and area of crosssection 3 10^ -6 m^2 is suspended vertically from one end. The rod is cooled...
- A resistance of 2 Ω is connected across one gap of a metre-bridge (the length of the wire is 100 cm) and an unknown resistance,...
- In an experiment to determine the focal length (f) of a concave mirror by the u-v method, a student places the object pin A on...
- A long, hollow conducting cylinder is kept coaxially inside another long, hollow conducting cylinder of larger radius. Both the...
- Consider a neutral conducting sphere. A positive point charge is placed outside the sphere. The net charge on the sphere is then,
- A ray of light traveling in water is incident on its surface open to air. The angle of incidence is θ, which is less than the...
- In the options given below, let E denote the rest mass energy of a nucleus and n a neutron. The correct option is
- The largest wavelength in the ultraviolet region of the hydrogen spectrum is 122 nm. The smallest wavelength in the infrared...
- STATEMENT-1 : A block of mass m starts moving on a rough horizontal surface with a velocity v. It stops due to friction between...
- STATEMENT-1 : In an elastic collision between two bodies, the relative speed of the bodies after collision is equal to the...
- STATEMENT-1 : The formula connecting u, v and f for a spherical mirror is valid only for mirrors whose sizes are very small...
- STATEMENT-1 : If the accelerating potential in an X-ray tube is increased, the wavelengths of the characteristic X-rays do not...
- In the experiment to determine the speed of sound using a resonance column,