Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AP EAMCET20227 Jul 2022Morning ShiftPhysicsDual Nature of MatterActual

A bulb of power 660 ~W radiates uniformly in all directions. The pressure exerted by the radiation on the surface at a distance of 5 ~m is

Options

  1. A5 10⁻⁸ ~Pa
  2. B2 10⁻⁹ ~Pa
  3. C7 10⁻⁹ ~Pa
  4. D3 10⁻⁸ ~Pa

Correct answer

C. 7 10⁻⁹ ~Pa

Step-by-step solution

Radiation pressure on a surface at a distance r from a bulb of power P is gives as, Radiation pressure = P 4 r^2 c (for perfectly absorbing surface) Here, P=660 ~W , r=5 ~m , c=3 10^8 ~m / s So, radiation pressure = 660 4 5^2 3 10^8 =7 10⁻⁹ ~Pa

Practice Dual Nature of Matter on Quantrex Academy →

More from Dual Nature of Matter

The basic principle used behind the working of electron microscope is: 2026The variation of the stopping potential ( V₀ ) with the frequency of incident radiation(n) is as given below. [ n₀ - threshold frequency. h- Planck's constant e- electronic charge] 2026When metal of work function 1.4eV is exposed to a radiation, the maximum kinetic energy of the electron emitted is 0.4eV. The stopping potential required is: 2026A monochromatic beam of photons of intensity to 1.5 Wm⁻² and energy 11.2 eV is incident on a material of work function 4.8 eV. What is the maximum speed of photoelectrons emitted d 2026What is the ratio of de Broglie wavelength of an electron to that of proton if the velocity of proton is 1 6 the velocity of electron? 2026Consider normal incidence of a monochromatic beam of photons of power P on a flat surface. Of the incident beam, 10% gets absorbed, 10% gets transmitted, and the rest is reflected 2026An experimental study of the photoelectric effect involves a metal of work function ₀ . What is the smallest wavelength of the incident photon to photoemit an electron of mass m wh 2026Work function of the metal is 2026 Full Dual Nature of Matter list All AP EAMCET PYQs