Physics questions
20027 published questions with worked solutions.
- A current of 1A is flowing on the sides of an equilateral triangle of side 4.5 10^ -2 m. The magnetic field at the center of the...
- A constant voltage is applied between two ends of metallic wire. If the length is halved and the radius of the wire is doubled,...
- The carrier frequency of a transmitter is provided by a tank circuit of a coil of inductance 49 µH and a capacitance of 2.5 nF....Not in JEE or NEET syllabus
- A proton of mass m collides elastically with a particle of unknown mass at rest. After the collision, the proton and the unknown...
- A disc rotates about its axis of symmetry in a horizontal plane at a steady rate of 3.5 revolutions per second. A coin placed at...
- 5 beats/second are heard when a tuning fork is sounded with a sonometer wire under tension, when the length of the sonometer wire...
- Two Carnot engines A and B are operated in series. Engine A receives heat from a reservoir at 600 K and rejects heat to a...
- A convergent doublet of separated lenses, corrected for spherical aberration, has resultant focal length of 10 cm. The separation...
- A body takes 10 minutes to cool from 60°C to 50°C. The temperature of surroundings is constant at 25°C. Then, the temperature of...
- When an air bubble of radius r rises from the bottom to the surface of a lake, its radius becomes 5r 4 . Taking the atmospheric...
- Muon ( ^ -1 ) is negatively charged (|q| = |e|) with a mass m_ = 200 ,m_e, where m_e is the mass of the electron and e is the...
- The value closest to the thermal velocity of a Helium atom at room temperature (300K) in ms^ -1 is - [k_B = 1.4 10^ -23 J/K; m_...
- 50 W/m^2 energy density of sunlight is normally incident on the surface of a solar panel. Some part of incident energy (25%) is...
- A moving coil galvanometer has a coil with 175 turns and area 1 cm^2. It uses a torsion band of torsion constant 10^ -6 N-m/rad....
- Two coils 'P' and 'Q' are separated by some distance. When a current of 3 A flows through coil 'P' a magnetic flux of 10^ -3 Wb...
- A particle of mass 'm' is moving with speed '2v' and collides with a mass '2m' moving with speed 'v' in the same direction. After...
- A wooden block floating in a bucket of water has 4 5 of its volume submerged. When certain amount of an oil is poured into the...
- The position of a particle as a function of time t, is given by x(t) = at + bt^2 - ct^3 where a, b and c are constants. When the...
- A thin smooth rod of length L and mass M is rotating freely with angular speed _0 about an axis perpendicular to the rod and...
- Moment of inertia of a body about a given axis is 1.5 kg m^2. Initially the body is at rest. In order to produce a rotational...