Dual Nature of Matter and Radiation — practice questions
32 curated practice questions from Dual Nature of Matter and Radiation (Physics NEET, NTA Exams) — 13 easy, 16 medium, 3 hard. Every question includes the final answer free; step-by-step worked solutions with a free account.
- An electron beam in an X-ray tube is accelerated through a potential of 40 x 10 3 V. These are then made to fall on a…
- A particle of mass 1 mg has the same wavelength as an electron moving with a velocity of 3 x 10 6 ms -1 . The velocity…
- Work function of tungsten and sodium are 4.4 eV and 2.3 eV respectively. If the threshold wavelength of sodium is 5460…
- X-rays are produced by accelerating electrons by voltage V and let they strike a metal of atomic number Z. The highest…
- The kinetic energy of an electron with de-Broglie's wavelength of 0.3 nm is:
- An electron is moving with a kinetic energy of 4.55 10^ -25 ~J . What will be the de-Broglie wavelength of this…
- If the kinetic energy of a free electron doubles, its de Broglie wavelength changes by the factor
- Light of wavelength 5000 a A falls on a sensitive plate with photoelectric work function of 1.9 eV. The maximum kinetic…
- Find the energy of a photon in watt-hour for electromagnetic waves of wavelength 3000 A . Given h=6.6 10^ -34 5 .
- Light with an energy flux of 20 W/cm 2 surface has an area of falls on a non-reflecting surface at normal incidence. If…
- Photon of frequency v has momentum associated with it. If c is the velocity of light, the momentum is
- A and B are two metals with threshold frequencies 1.8 10^ 14 ~Hz and 2.2 10^ 14 ~Hz . Two identical photons of energy…
- A light source is at a distance d from a photoelectric cell and then the number of photoelectrons emitted from the cell…
- When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectron emitted from a…
- The number of photons per second on an average emitted by the source of monochromatic light of wavelength 600 nm, when…
- The shortest wavelength of X-rays emitted from an X-ray tube depends on
- Find the photon energy in units of eV for electromagnetic waves of wavelength 40 m. Given, h=6.63 10^ -34 ~J
- X-rays are produced in an X-ray tube operating at a given accelerating voltage. The wavelength of the continuous X-rays…
- Two particles A and B are in motion and wavelength of A is 5 10^ -4 ~m . The wavelength of B, so that its momentum is…
- When ultraviolet rays are incident on a metal plate, the photoelectric effect does not occur. It occurs by incidence of:
- If the momentum of electron is changed by P, then the de Broglie's wavelength associated with it changes by 0.5%. The…
- An II -particle moves in a circular path of radius 0.83 cm in the presence of a magnetic field of 0.25 Wb/m 2 . The…
- A source S 1 is producing 10 15 photons per second of wavelength 5000 . Another source S 2 is producing 1.02 10^ 15…
- A tennis ball of mass 6.023 10^ -1 ~kg is moving with a speed of 62 m sec -1 . Will the movement of this ball exhibit a…
- The de Broglie wavelength ( ) associated with a photoelectron varies with the frequency ( ) of the incident radiation…
- Which one of the following statements is WRONG in the context of X-rays generated from a X-ray tube?
- In X-rays diffraction experiment distance between atomic lattice planes of diffraction grating is 2.8 × 10 -10 m, then…
- When photons of energy h v falls on a photosensitive metal surface (work function h v _ g ) electrons are emitted from…
- Electrons with de Broglie wavelength λ fall on the target in an X - ray tube. The cut-off wavelength of the emitted X …
- Light of wavelength 500 nm is incident on a metal with work function 2.28 eV. The de Broglie wavelength of the emitted…
- The work functions for metals A, B and C are respectively 1.92 eV, 2.0 eV and 5 eV. According to Einstein's equation…
- Electrons of mass m with de-Broglie wavelength fall on the target in an X-ray tube. The cutoff wavelength ( _ g ) of…