Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)
Two metallic plate A and B , each of area 5×10−4m2 , are placed parallel to each at a separation of 1cm plate B carries a positive charge of 33.7×10−12C A monocharonatic beam of light , with photoes of energy 5eV each , starts falling on plate A at t=0 so that 1016 photons fall on it per square meter per second. Assume that one photoelectron is emitted for every 106 incident photons fall on it per square meter per second. Also assume that all the emitted photoelectrons are collected by plate B and the work function of plate A remain constant at the value 2eV Determine (a) the number of photoelectrons emitted up to i=10s,
13
Sep
Two metallic plate A and B , each of area 5×10−4m2 , are placed parallel to each at a separation of 1cm plate B carries a positive charge of 33.7×10−12C A monocharonatic beam of light , with photoes of energy 5eV each , starts falling on plate A at t=0 so that 1016 photons fall [...]
Tags:
are placed parallel to each at a separation of 1cm plate B carries a positive charge of 33.7×10−12C A monocharonatic beam of light ,
each of area 5×10−4m2 ,
potassium ,
sodium and lithium. The plots are parallel. Correct ranking of the targets according to their work function greatest first will be ,
The figure shows different graphs between stopping potential (V0) and frequency (v) for photosensitive surface of cesium ,
Two metallic plate A and B ,
with photoes of energy 5eV each ,
Photoelectric emission is observed from a surface for frequencies v1 and v2 of the incident radiation (v1>v2) . If the maximum kinetic energies of the photoelectrons in two cases are in ratio 1 : K then the threshold frequency v0 is given by.
13
Sep
Photoelectric emission is observed from a surface for frequencies v1 and v2 of the incident radiation (v1>v2) . If the maximum kinetic energies of the photoelectrons in two cases are in ratio 1 : K then the threshold frequency v0 is given by. potassium sodium and lithium. The plots are parallel. Correct ranking of the [...]
In the following arrangement y = 1.0 mm, d = 0.24 mm and D = 1.2 m . The work function of the material of the emitter is 2.2 eV . The stopping potential V needed to stop the photo current will be
13
Sep
In the following arrangement y = 1.0 mm, d = 0.24 mm and D = 1.2 m . The work function of the material of the emitter is 2.2 eV . The stopping potential V needed to stop the photo current will be d = 0.24 mm and D = 1.2 m . The work [...]
In a photoemissive cell, with exciting wavelength λ, the faster electron has speed v. If the exciting wavelength is changed to 3λ/4, the speed of the fastest electron will be
13
Sep
In a photoemissive cell, with exciting wavelength λ, the faster electron has speed v. If the exciting wavelength is changed to 3λ/4, the speed of the fastest electron will be In a photoemissive cell the faster electron has speed v. If the exciting wavelength is changed to 3λ/4 the speed of the fastest electron will [...]
In a photocell bichromatic light of wavelength `2475 Å` and `6000 Å` are incident on cathode whose work function is `4.8 eV`. If a uniform magnetic field of `3 xx 10^(-5) Tesla` exists parallel to the plate , the radius of the path describe by the photo electron will be (mass of electron ` = 9 x 10^(-31) kg`)
13
Sep
In a photocell bichromatic light of wavelength `2475 Å` and `6000 Å` are incident on cathode whose work function is `4.8 eV`. If a uniform magnetic field of `3 xx 10^(-5) Tesla` exists parallel to the plate , the radius of the path describe by the photo electron will be (mass of electron ` = [...]
If light of wavelength λ1 is allowed to fall on a metal , then kinetic energy of photoelectrons emitted is E1. If wavelength of light changes to λ2 then kinetic energy of electrons changes to E2. Then work function of the metal is
13
Sep
If light of wavelength λ1 is allowed to fall on a metal , then kinetic energy of photoelectrons emitted is E1. If wavelength of light changes to λ2 then kinetic energy of electrons changes to E2. Then work function of the metal is If light of wavelength λ1 is allowed to fall on a metal [...]
If the source of monochromatic radiation of wavelength 124 Å has an efficiency of 50% , and the power of X ray emitted by the tungsten target is 3 W , the overall efficiency of the apparatus for X−ray production is
13
Sep
If the source of monochromatic radiation of wavelength 124 Å has an efficiency of 50% , and the power of X ray emitted by the tungsten target is 3 W , the overall efficiency of the apparatus for X−ray production is and the power of X ray emitted by the tungsten target is 3 W [...]
Light of wave length 2475 A is incident on barium. photo electrons emitted describe a circle of radius 100 cm by a magnetic field of flux density 1/ root7 x 10^-5 Tesla. Work function of the barium is (Given e/m = 1.7 x 10^11 )
13
Sep
Light of wave length 2475 A is incident on barium. photo electrons emitted describe a circle of radius 100 cm by a magnetic field of flux density 1/ root7 x 10^-5 Tesla. Work function of the barium is (Given e/m = 1.7 x 10^11 ) potassium sodium and lithium. The plots are parallel. Correct ranking [...]
If maximum velocity with which an electron can be emitted from a photo cell is 4 x 10^8 cm/sec, the stopping potential is ( mass of electron = 9 x 10^-31 kg )
13
Sep
If maximum velocity with which an electron can be emitted from a photo cell is 4 x 10^8 cm/sec, the stopping potential is ( mass of electron = 9 x 10^-31 kg ) If maximum velocity with which an electron can be emitted from a photo cell is 4 x 10^8 cm/sec the stopping potential [...]
The figure shows different graphs between stopping potential (V0) and frequency (v) for photosensitive surface of cesium , potassium , sodium and lithium. The plots are parallel. Correct ranking of the targets according to their work function greatest first will be
13
Sep
The figure shows different graphs between stopping potential (V0) and frequency (v) for photosensitive surface of cesium , potassium , sodium and lithium. The plots are parallel. Correct ranking of the targets according to their work function greatest first will be potassium sodium and lithium. The plots are parallel. Correct ranking of the targets according [...]