Physics questions
20027 published questions with worked solutions.
- A coil of inductance 300mH and resistance 2Ω is connected to a source of voltage 2V. The current reaches half of its steady state...
- The self inductance of the motor of an electric fan is 10H. In order to impart maximum power at 50 Hz, it should be connected to...
- A circuit has a resistance of 12Ω and an impedance of 15Ω. The power factor of the circuit will be
- The phase difference between the alternating current and emf is /2. Which of the following cannot be the constituent of the...
- A fish looking up through the water sees the outside world contained in a circular horizon. If the refractive index of water is...
- A thin glass (refractive index 1.5) lens has optical power of -5D in air. Its optical power in a liquid medium with refractive...
- A Young's double slit experiment uses a monochromatic source. The shape of the interference fringes formed on a screen is
- Two point white dots are 1 mm apart on a black paper. They are viewed by eye of pupil diameter 3 mm. Approximately, what is the...
- When an unpolarized light of intensity I_0 is incident on a polarizing sheet, the intensity of the light which does not get...
- If I_0 is the intensity of the principal maximum in the single slit diffraction pattern, then what will be its intensity when the...
- A photocell is illuminated by a small bright source placed 1 m away. When the same source of light is placed 12 m away, the...
- If the kinetic energy of a free electron doubles. Its deBroglie wavelength changes by the factor
- The intensity of gamma radiation from a given source is I. On passing through 36 mm of lead, it is reduced to I 8 . The thickness...
- Starting with a sample of pure ^ 66 Cu, 7/8 of it decays into Zn in 15 minutes. The corresponding half-life is
- If radius of ^ 27 _ 13 Al nucleus is estimated to be 3.6 Fermi then the radius ^ 125 _ 52 Te nucleus be nearly
- The electrical conductivity of a semiconductor increases when electromagnetic radiation of wavelength shorter than 2480 nm is...Not in JEE Advanced syllabus
- Which of the following units denotes the dimensions ML^2/Q^2, where Q denotes the electric charge?
- A particle located at x = 0 at time t = 0, starts moving along the positive x-direction with a velocity ' v ' that varies as v =...
- A body falling from rest under gravity passes a certain point P. It was at a distance of 400 m from P, 4 s prior to passing...
- A mass of Mkg is suspended by a weightless string. The horizontal force that is required to displace it until the string makes an...