Physics questions
20027 published questions with worked solutions.
- A hydraulic automobile lift is designed to lift vechicles of mass 5000 kg. The area of cross section of the cylinder carrying...
- Work done by a Carnot engine operating between temperatures 127°C and 27°C is 2 kJ. The amount of heat transferred to the engine...
- Given below are two statements: Statement I: Area under velocity-time graph gives the distance travelled by the body in a given...
- The temperature at which the kinetic energy of oxygen molecules becomes double than its value at 27°C is
- Electric potential at a point 'P' due to a point charge of 5 10^ -9 C is 50 V. The distance of 'P' from the point charge is :...
- A series combination of resistor of resistance 100 inductor of inductance 1 H and capacitor of capacitance 6.25 is connected to...
- A guitar string of length 90 cm vibrates with a fundamental frequency of 120 Hz. The length of the string producing a fundamental...
- A 600 pF capacitor is charged by 200 V supply. It is then disconnected from the supply and connected to another uncharged 600 pF...
- The number density of free electrons in copper is nearly 8 10^ 28 m^ -3 . A copper wire has its area of cross section = 2 10^ -6...
- A body of mass 5 kg is moving with a momentum of 10 kg ms^ -1 . Now a force of 2 N acts on the body in the direction of its...
- The ratio of magnetic field at the centre of a current carrying coil of radius r to the magnetic field at distance r from the...
- A steel rod of length 1 m and cross sectional area 10^ -4 m^2 is heated from 0°C to 200°C without being allowed to extend or...
- The ratio of wavelength of spectral lines H_ and H_ in the Balmer series is x 20 . The value of x is _____
- The engine of a train moving with speed 10 ms^ -1 towards a platform sounds a whistle at frequency 400 Hz. The frequency heard by...
- In a reflecting telescope, a secondary mirror is used to:
- A charge particle moving in magnetic field B, has the components of velocity along B as well as perpendicular to B. The path of...
- A cylindrical wire of mass (0.4 0.01)g has length (8 0.04) cm and radius (6 0.03)mm. The maximum error in its density will be -
- For a nucleus ^A_ZX having mass number A and atomic number Z A. The surface energy per nucleon (b_s) = -a_1A^ 2/3 B. The Coulomb...
- Given below are two statements: Statement I: If heat is added to a system, its temperature must increase. Statement II: If...
- At any instant the velocity of a particle of mass 500 g is (2t i +3t^2 j )ms^ -1 . If the force acting on the particle at t = 1s...