JEE Mains Physics 2002-2019 Solved Video Solutions
The radiation corresponding to 3→2 transition of hydrogen atom falls on a metal surface to produce photoelectrons. These electrons are made to enter a magnetic field of 3×10^−4T. If the radius of the largest circular path followed by these electrons is 10.0 mm, the work function of the metal is close to
29
Nov
The radiation corresponding to 3→2 transition of hydrogen atom falls on a metal surface to produce photoelectrons. These electrons are made to enter a magnetic field of 3×10^−4T. If the radius of the largest circular path followed by these electrons is 10.0 mm, the work function of the metal is close to an electron of [...]
Radiation of wavelength λ, is incident on a photocell. The fastest emitted electron has speed v. If the wavelength is changed to 3λ/4, the speed of the fastest emitted electron will be :
29
Nov
Radiation of wavelength λ, is incident on a photocell. The fastest emitted electron has speed v. If the wavelength is changed to 3λ/4, the speed of the fastest emitted electron will be : is incident on a photocell. The fastest emitted electron has speed v. If the wavelength is changed to 3λ/4 Radiation of wavelength [...]
An electron beam is accelerated by a potential difference V to hit a metallic target to produce X−rays. It produces continuous as well as characteristic X−rays. If λmin is the smallest possible wavelength of X−ray in the spectrum, the variation of logλmin with log V is correctly represented in :
29
Nov
An electron beam is accelerated by a potential difference V to hit a metallic target to produce X−rays. It produces continuous as well as characteristic X−rays. If λmin is the smallest possible wavelength of X−ray in the spectrum, the variation of logλmin with log V is correctly represented in : In an electron microscope the [...]
An electron from various excited states of hydrogen atom emit radiation to come to the ground state. Let λn,λg be the de Broglie wavelength of the electron in the nth state and the ground state respectively. Let ⋀n be the wavelength of the emitted photon in the transition from the nth state to the ground state. For large n, (A, B are constants)
29
Nov
An electron from various excited states of hydrogen atom emit radiation to come to the ground state. Let λn,λg be the de Broglie wavelength of the electron in the nth state and the ground state respectively. Let ⋀n be the wavelength of the emitted photon in the transition from the nth state to the ground [...]
Posted in:
Chapter 17 - Dual Nature of Radiation
,
JEE Mains Physics 2002-2019 Solved Video Solutions
,
Tags:
An electron from various excited states of hydrogen atom emit radiation to come to the ground state. Let λn ,
In an electron microscope ,
the minimum electron energy required is close to ,
the resolution that can be achieved is of the order of the wavelength of electrons used. To resolve a width of 7.5×10^−12m ,
When a certain photosensitive surface is illuminated with monochromatic light of frequency v, the stopping potential for the photo current is −V0/2. When the surface is illuminated by monochromatic light of frequency v/2, the stopping potential is −V0. The threshold frequency for photoelectric emission is :
29
Nov
When a certain photosensitive surface is illuminated with monochromatic light of frequency v, the stopping potential for the photo current is −V0/2. When the surface is illuminated by monochromatic light of frequency v/2, the stopping potential is −V0. The threshold frequency for photoelectric emission is : the stopping potential for the photo current is −V0/2. [...]
Posted in:
Chapter 17 - Dual Nature of Radiation
,
JEE Mains Physics 2002-2019 Solved Video Solutions
,
Tags:
the stopping potential for the photo current is −V0/2. When the surface is illuminated by monochromatic light of frequency v/2 ,
the stopping potential is −V0. The threshold frequency for photoelectric emission is : ,
When a certain photosensitive surface is illuminated with monochromatic light of frequency v ,
In a Frank-Hertz experiment, an electron of energy 5.6 eV passes through mercury vapour and emerges with an energy 0.7 eV. The minimum wavelength of photons emitted by mercury atoms is close to
29
Nov
In a Frank-Hertz experiment, an electron of energy 5.6 eV passes through mercury vapour and emerges with an energy 0.7 eV. The minimum wavelength of photons emitted by mercury atoms is close to an electron of energy 5.6 eV passes through mercury vapour and emerges with an energy 0.7 eV. The minimum wavelength of photons [...]
A particle A of mass ‘m’ and charge ‘q’ is accelerated by a potential difference of 50 V. Another particle B of mass ‘4 m’ and charge ‘q’ is accelerated by a potential difference of 2500 V. The ratio of de-Broglie wavelengths λA/λB is close to :
29
Nov
A particle A of mass ‘m’ and charge ‘q’ is accelerated by a potential difference of 50 V. Another particle B of mass ‘4 m’ and charge ‘q’ is accelerated by a potential difference of 2500 V. The ratio of de-Broglie wavelengths λA/λB is close to : A 2 mW laser operates at a wavelength [...]
In a photoelectric experiment, the wavelength of the light incident on a metal is changed from 300 nm to 400 nm. The decrease in the stopping potential is close to : (hc/e=1240nm−V)
29
Nov
In a photoelectric experiment, the wavelength of the light incident on a metal is changed from 300 nm to 400 nm. The decrease in the stopping potential is close to : (hc/e=1240nm−V) In a photoelectric experiment the wavelength of the light incident on a metal is changed from 300 nm to 400 nm. The decrease [...]
If the de-Broglie wavelength of an electron is equal to 10^–3 times the wavelength of a photon of frequency 6 × 10^14 Hz then the speed of electron is equal to : Speed of light = 3 × 10^8 m/s Planck’s constant = 6.63 × 10^–34 J.s Mass of electron = 9.1 × 10^–31 kg
29
Nov
If the de-Broglie wavelength of an electron is equal to 10^–3 times the wavelength of a photon of frequency 6 × 10^14 Hz then the speed of electron is equal to : Speed of light = 3 × 10^8 m/s Planck’s constant = 6.63 × 10^–34 J.s Mass of electron = 9.1 × 10^–31 kg [...]
A metal plate of area 1×10^−4m^2 is illuminated by a radiation of intensity 16 mW/m^2. The work function of the metal is 5eV. The energy of the incident photons is 10 eV and only 10% of it produces photo electrons. The number of emitted photo electrons per second and their maximum energy, respectively, will be : [1eV=1.6×10^−19J]
29
Nov
A metal plate of area 1×10^−4m^2 is illuminated by a radiation of intensity 16 mW/m^2. The work function of the metal is 5eV. The energy of the incident photons is 10 eV and only 10% of it produces photo electrons. The number of emitted photo electrons per second and their maximum energy, respectively, will be [...]