If particles are moving with same velocity, then maximum de Broglie wavelength will be for
Options
(a) Neutron (b) Proton (c) α-particle (d) β-particle
Correct Answer:
β-particle
Explanation:
No explanation available. Be the […]
When ultraviolet rays are incident on metal plate, then photoelectric effect does not occur. It occur by the incidence of
Options
(a) Radio-waves (b) Infra red rays (c) Green house effect (d) X-rays
In photoelectric effect, the photoelectric current
Options
(a) depends both on intensity and frequency of incident beam (b) does not depend on frequency but depends only on intensity of incident beam (c) increases […]
Maximum kinetic energy of electrons emitted in photoelectric effect increases when
Options
(a) intensity of light is increased (b) light source is brought nearer the metal (c) frequency of light is decreased (d) […]
Energy of photon whose frequency is 10¹² MHz will be
Options
(a) 4.14×10³ KeV (b) 4.14×10² eV (c) 4.14×10³ MeV (d) 4.14×10³ eV
Correct Answer:
4.14×10³ eV
Explanation:
No explanation available. Be the […]
When radiation is incident on a photoelectron emitter, the stopping potential is found to be 9 volt. If e/m for the electron is 1.8×10¹¹ Ckg⁻¹, the maximum velocity of the ejected electrons is
Options […]
Photocells convert
Options
(a) heat energy into electrical energy (b) light energy into mechanical energy (c) thermal energy into mechanical energy (d) light energy into electrical energy
Correct Answer:
light energy into electrical […]
The number of photons of wavelength of 540 nm emitted per second by an electric bulb of power 100 W is (given h=6×10⁻³⁴ J-s)
Options
(a) 100 (b) 1000 (c) 3×10²⁰ (d) 3×10¹⁸
Correct […]
Maximum velocity of the photoelectron emitted by a metal is 1.8×10⁶ ms⁻¹. Take the value of specific charge of the electron is 1.8×10¹¹ C kg⁻¹. Then the stopping potential in volt is
Options
The additional energy that should be given to an electron to reduce its de-Broglie wavelength from 1nm to 0.5nm is
Options
(a) 2 times the initial kinetic energy (b) 3 times the initial […]
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