Physics questions
20027 published questions with worked solutions.
- A long straight wire of circular cross-section (radius a) is carrying steady current I. The current I is uniformly distributed...
- Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Earth has...
- The kinetic energy of an electron, an -particle and a proton are given as 4 K, 2 K and K respectively. The de-Broglie wavelength...
- A parallel plate capacitor with plate area A and plate separation d is filled with a dielectric material of dielectric constant K...
- A particle of mass 10 g moves in a straight line with retardation 2x, where x is the displacement in SI units. Its loss of...
- A person driving car at a constant speed of 15 m/s is approaching a vertical wall. The person notices a change of 40 Hz in the...
- A steel rod has a radius of 20 mm and a length of 2.0 m. A force of 62.8 kN stretches it along its length. Young's modulus of...
- An ideal transformer with purely resistive load operates at 12 kV on the primary side. It supplies electrical energy to a number...
- The length of a metallic wire is increased by 20% and its area of cross section is reduced by 4%. The percentage change in...
- Two identical solid spheres each of mass 2 kg and radii 10 cm are fixed at the ends of a light rod. The separation between the...
- The width of fringe is 2 mm on the screen in a double slit experiment for the light of wavelength 400 nm. The width of the fringe...
- The trajectory of projectile, projected from the ground is given by y = x – x^2 20 , where x and y are measured in meter. The...
- The orbital angular momentum of a satellite is L, when it is revolving in a circular orbit at height h from earth surface. If the...
- In photo electric effect A. The photocurrent is proportional to the intensity of the incident radiation. B. Maximum kinetic...
- An emf of 0.08 V is induced in a metal rod of length 10 cm held normal to a uniform magnetic field of 0.4T, when move with a...
- The acceleration due to gravity at height h above the earth if h << R (Radius of earth) is given by
- A radio active material is reduced to 1 8 original amount in 3 days. If 8 10^ -3 kg of the material is left after 5 days the...
- The waves emitted when a metal target is bombarded with high energy electrons are
- A bullet of mass 0.1 kg moving horizontally with speed 400 ms^ -1 hits a wooden block of mass 3.9 kg kept on a horizontal rough...
- Match List I with List II List-I: A. Torque B. Stress C. Pressure gradient D. Coefficient of viscosity List-II: I. ML^ -2 T^ -2...