Physics questions
20027 published questions with worked solutions.
- A pulley of radius 2 m is rotated about its axis by a force F = (20t - 5t^2) Newton (where t is measured in seconds) applied...
- Two bodies of masses m and 4 m are placed at a distance r. The gravitational potential at a point on the line joining them where...
- Work done in increasing the size of a soap bubble from a radius of 3 cm to 5 cm is nearly (Surface tension of soap solution =...
- Water is flowing continuously from a tap having an internal diameter 8 10^ -3 m. The water velocity as it leaves the tap is 0.4...
- 100 g of water is heated from 30°C to 50°C. Ignoring the slight expansion of the water, the change in its internal energy is...
- A Carnot engine operating between temperatures T_1 and T_2 has efficiency 16. When T_2 is lowered by 62 K, its efficiency...
- A thermally insulated vessel contains an ideal gas of molecular mass M and ratio of specific heats γ. It is moving with speed v...
- Three perfect gases at absolute temperatures T_1, T_2 and T_3 are mixed. The masses of molecules are m_1, m_2 and m_3 and the...
- Two particles are executing simple harmonic motion of the same amplitude A and frequency ω along the x-axis. Their mean position...
- A mass M, attached to a horizontal spring, executes S.H.M. with amplitude A_1. When the mass M passes through its mean position...
- The transverse displacement y(x, t) of a wave on a string is given by y(x, t) = e^ - (ax^2 + bt^2 + 2 ab xt ) . This represents a
- Two identical charged spheres suspended from a common point by two massless strings of length l are initially a distance d(d <<...
- The electrostatic potential inside a charged spherical ball is given by = ^2 + b where r is the distance from the centre; a, b...
- A resistor 'R' and 2μF capacitor in series is connected through a switch to 200 V direct supply. Across the capacitor is a neon...
- A current I flows in an infinitely long wire with cross section in the form of a semicircular ring of radius R. The magnitude of...
- A boat is moving due east in a region where the earth's magnetic field is 5.0 10^ -5 NA^ -1 m^ -1 due north and horizontal. The...
- A fully charged capacitor C with initial charge q_0 is connected to a coil of self inductance L at t = 0. The time at which the...
- Let the x − z plane be the boundary between two transparent media. Medium 1 in z ≥ 0 has a refractive index of 2 and medium 2...
- A car is fitted with a convex side-view mirror of focal length 20 cm. A second car 2.8 m behind the first car is overtaking the...
- Direction: The question has a paragraph followed by two statements, Statement −1 and statement −2. Of the given four alternatives...