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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 [...]
Which of the following turn lime water milky (a) SO2 (b) CO2 (c) CO (d) Cl2
29
Nov
Which of the following turn lime water milky (a) SO2 (b) CO2 (c) CO (d) Cl2 Which of the following turn lime water milky (a) SO2 (b) CO2 (c) CO (d) Cl2 November 29, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
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 [...]
In an electron microscope, 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, the minimum electron energy required is close to :
29
Nov
In an electron microscope, 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, the minimum electron energy required is close to : In an electron microscope the minimum electron energy required is close to the resolution that can be achieved is of [...]
Which of the following properties of white phosphorus are not shared by red phosphorus (a) It shows phosphorescence in air
29
Nov
Which of the following properties of white phosphorus are not shared by red phosphorus (a) It shows phosphorescence in air Which of the following properties of white phosphorus are not shared by red phosphorus (a) It shows phosphorescence in air November 29, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
Which of the following statement are correct regardly 17th group elements (a) I- reduces Cu 2+ to Cu +
29
Nov
Which of the following statement are correct regardly 17th group elements (a) I- reduces Cu 2+ to Cu + Which of the following statement are correct regardly 17th group elements (a) I- reduces Cu 2+ to Cu + November 29, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
Which of the following statement (s) is/are correct for group-2 metals (a) On descending down the group, the lattice energy as well as hydration energy decreases
29
Nov
Which of the following statement (s) is/are correct for group-2 metals (a) On descending down the group, the lattice energy as well as hydration energy decreases the lattice energy as well as hydration energy decreases Which of the following statement (s) is/are correct for grouop-2 metals (a) On descending down the group November 29, 2020 [...]
Sodium thiosulphate can be prepared by (a) Boiling Na2SO3 solution with sulphur in acidic medium (b) Boiling an aqueous solution of NaOH with sulphur
29
Nov
Sodium thiosulphate can be prepared by (a) Boiling Na2SO3 solution with sulphur in acidic medium (b) Boiling an aqueous solution of NaOH with sulphur Sodium thiosulphate can be prepared by (a) Boiling Na2SO3 solution with sulphur in acidic medium (b) Boiling an aqueous solution of NaOH with sulphur November 29, 2020 Category: Uncategorised (JEE Advanced [...]