Physics questions
20027 published questions with worked solutions.
- A 15 g mass of nitrogen gas is enclosed in a vessel at a temperature 27ºC. Amount of heat transferred to the gas, so that rms...
- A particle is executing simple harmonic motion (SHM) of amplitude A, along the x-axis, about x = 0. When its potential Energy...
- The energy required to take a satellite to a height 'h' above Earth surface (radius of Earth = 6.4 10^ 3 km) is E_1 and kinetic...
- A musician using an open flute of length 50 cm produces second harmonic sound waves. A person runs towards the musician from...
- A particle having the same charge as of electron moves in a circular path of radius 0.5 cm under the influence of a magnetic...
- The energy associated with electric field is (U_E) and with magnetic field is (U_B) for an electromagnetic wave in free space....
- Two point charges q_1 ( 10 μC) and q_2 (−25 μC) are placed on the x-axis at x = 1 m and x = 4 m respectively. The electric field...
- A mixture of 2 moles of helium gas (atomic mass = 4u), and 1 mole of argon gas (atomic mass = 40u) is kept at 300 K in a...
- A sample of radioactive material A, that has an activity of 10 mCi (1 Ci = 3.7 10^ 10 decays/s), has twice the number of nuclei...
- A convex lens is put 10 cm from a light source and it makes a sharp image on a screen, kept 10 cm from the lens. Now a glass...
- For a uniformly charged ring of radius R, the electric field on its axis has the largest magnitude at a distance h from its...
- Drift speed of electrons, when 1.5 A of current flows in a copper wire of cross section 5 mm^2, is v. If electron density in...
- A plane electromagnetic wave of frequency 50 MHz travels in free space along the positive x-direction. At a particular point in...
- Surface of certain metal is first illuminated with light of wavelength _1 = 350 nm and then, by light of wavelength _2 = 540 nm....
- A heavy ball of mass M is suspended from the ceiling of a car by a light string of mass m (m << M). When the car is at rest, the...
- Mobility of electrons in a semiconductor is defined as the ratio of their drift velocity to the applied electric field. If, for...
- If the angular momentum of a planet of mass m, moving around the Sun in a circular orbit is L, about the center of the Sun, its...
- A particle is moving with a velocity v = K(y i + x j), where K is a constant. The general equation for its path is:
- A copper wire is stretched to make it 0.5% longer. The percentage change in its electrical resistance if its volume remains...
- Three charges +Q, q, +Q are placed respectively, at distance, 0, d/2 and d from the origin, on the x-axis. If the net force...