Physics questions
20027 published questions with worked solutions.
- A mixture of light, consisting of wavelength 590 nm and an unknown wavelength, illuminates Young's double slit and gives rise to...
- The surface of a metal is illuminated with the light of 400 nm. The kinetic energy of the ejected photoelectrons was found to be...
- In an experiment the angles are required to be measured using an instrument. 29 divisions of the main scale exactly coincide with...
- The respective number of significant figures for the numbers 23.023, 0.0003 and 2.1 10^ -3 are
- The potential energy function for the force between two atoms in a diatomic molecule is approximately given by U(x) = a x^ 12 - b...
- Statement-1 : Two particles moving in the same direction do not lose all their energy in a completely inelastic collision....
- For a particle in uniform circular motion the acceleration a at a point P(R, ) on the circle of radius R is (here θ is measured...
- Two conductors have the same resistance at 0°C but their temperature coefficients of resistance are _1 and _2. The respective...
- A diatomic ideal gas is used in a Car engine as the working substance. If during the adiabatic expansion part of the cycle,...
- The equation of a wave on a string of linear mass density 0.04 kg m^ -1 is given by y = 0.02(m) [2 ( t 0.04(s) - x 0.50(m) ) ]....
- Let there be a spherically symmetric charge distribution with charge density varying as (r) = _0 ( 54 - rR ) upto r = R, and (r)...
- Two identical charged spheres are suspended by strings of equal lengths. The strings make an angle of 30° with each other. When...
- Let C be the capacitance of a capacitor discharging through a resistor R. Suppose t_1 is the time taken for the energy stored in...
- In a series LCR circuit R = 200Ω and the voltage and the frequency of the main supply is 220 V and 50 Hz respectively. On taking...
- If a source of power 4 kW produces 10^ 20 photons/second, the radiation belong to a part of the spectrum called
- Statement-1 : When ultraviolet light is incident on a photocell, its stopping potential is V_0 and the maximum kinetic energy of...
- A radioactive nucleus (initial mass number A and atomic number Z) emits 3α-particles and 2 positrons. The ratio of number of...
- An object, moving with a speed of 6.25 m/s, is decelerated at a rate given by : dv dt = -2.5 v where v is the instantaneous...
- A mass m hangs with the help of a string wrapped around a pulley on a frictionless bearing. The pulley has mass m and radius R....
- A thin horizontal circular disc is rotating about a vertical axis passing through its centre. An insect is at rest at a point...