Physics questions
20027 published questions with worked solutions.
- In a Frank-Hertz experiment, an electron of energy 5.6 eV passes through mercury vapour and emerges with an energy 0.7 eV. The...
- A load of mass M kg is suspended from a steel wire of length 2 m and radius 1.0 mm in Searle's apparatus experiment. The increase...
- A parallel plate capacitor with plates of area 1 m^2 each, are at a separation of 0.1 m. If the electric field between the plates...
- A vertical closed cylinder is separated into two parts by a frictionless piston of mass m and of negligible thickness. The piston...
- An alpha-particle of mass m suffers 1-dimensional elastic collision with a nucleus at rest of unknown mass. It is scattered...
- A resonance tube is old and has jagged end. It is still used in the laboratory to determine velocity of sound in air. A tuning...
- A 10 m long horizontal wire extends from North East to South West. It is falling with a speed of 5.0 ms^ -1 , at right angles to...
- A long cylindrical vessel is half filled with a liquid. When the vessel is rotated about its own vertical axis, the liquid rises...
- In a radioactive decay chain, the initial nucleus is ^ 232 _ 90 Th. At the end there are 6 α-particles and 4 β-particles which...
- A paramagnetic material has 10^ 28 atoms/m^3. Its magnetic susceptibility at temperature 350 K is 2.8 10^ -4 . Its susceptibility...Not in JEE Advanced syllabus
- To double the covering range of a TV transmission tower, its height should be multiplied by:Not in JEE or NEET syllabus
- A person standing on an open ground hears the sound of a jet aeroplane, coming from north at an angle 60° with ground level. But...
- A cylinder of radius R is surrounded by a cylindrical shell of inner radius R and outer radius 2R. The thermal conductivity of...
- A particle A of mass 'm' and charge 'q' is accelerated by a potential difference of 50 V. Another particle B of mass '4m' and...
- A light wave is incident normally on a glass slab of refractive index 1.5. If 4% of light gets reflected and the amplitude of the...
- Let the moment of inertia of a hollow cylinder of length 30 cm (inner radius 10 cm and outer radius 20 cm), about its axis be I....
- A travelling harmonic wave is represented by the equation y(x, t) = 10^ -3 (50t + 2x), where x and y are in meter and t is in...
- A simple pendulum, made of a string of length ℓ and a bob of mass m, is released from a small angle _0. It strikes a block of...
- The least count of the main scale of a screw gauge is 1 mm. The minimum number of divisions on its circular scale required to...
- A satellite of mass M is in a circular orbit of radius R about the centre of the earth. A meteorite of the same mass, falling...