Physics questions
20027 published questions with worked solutions.
- Let _ 1 is the efficiency of an engine at T_ 1 = 447^ C and T_ 2 = 147^ C while _ 2 is the efficiency at T_ 1 = 947^ C and T_ 2 =...
- An object is taken to a height above the surface of earth at a distance 5R/4 from the centre of the earth. Where radius of earth,...
- A bag of sand of mass 9.8 kg is suspended by a rope. A bullet of 200 g travelling with speed 10 ms^ -1 gets embedded in it, then...
- A ball is projected from the ground with a speed 15 ms^ -1 at an angle with horizontal so that its range and maximum height are...
- The maximum error in the measurement of resistance, current and time for which current flows in an electrical circuit are 1%, 2%...
- Hydrogen atom from excited state comes to the ground state by emitting a photon of wavelength . The value of principal quantum...
- A particle is moving in a straight line such that its velocity is increasing at 5 ms^ -1 per meter. The acceleration of the...
- A block of ice of mass 120 g at temperature 0°C is put in 300 g of water at 25°C. The x g of ice melts as the temperature of the...
- Two waves executing simple harmonic motions travelling in the same direction with same amplitude and frequency are superimposed....
- Magnetic flux (in weber) in a closed circuit of resistance 20 varies with time t(s) as = 8t^ 2 - 9t + 5. The magnitude of the...
- If momentum [P], area [A] and time [T] are taken as fundamental quantities, then the dimensional formula for coefficient of...
- Which of the following physical quantities have the same dimensions ?
- A body of mass 0.5 kg travels on straight line path with velocity v = (3x^ 2 + 4) m/s. The net workdone by the force during its...
- A solid cylinder and a solid sphere, having same mass M and radius R, roll down the same inclined plane from top without...
- A certain amount of gas of volume V at 27°C temperature and pressure 2 10^ 7 Nm^ -2 expands isothermally until its volume gets...
- To increase the resonant frequency in series LCR circuit,
- The rms value of conduction current in a parallel plate capacitor is 6.9 A. The capacity of this capacitor, if it is connected to...
- Time taken by light to travel in two different materials A and B of refractive indices _ A and _ B of same thickness is t_ 1 and...
- A metal exposed to light of wavelength 800 nm and emits photoelectrons with a certain kinetic energy. The maximum kinetic energy...
- The momentum of an electron revolving in n^ th orbit is given by : (Symbols have their usual meanings)