Physics question and answers for July 01, 2023
- Q d E p lc 6 Which of o a E p c b E 7 Two photons having a equal wavelengths have equal linear momenta b equal energies have equal...
- Q Hydrogen atom in ground state is excited by a monochromatic radiation of 975 A Number of spectral lines in the resulting spectrum emitted will be AIPMT 2014 1 3 3...
- Q In the Bohr model of H atom an electron e is revolving around a proton p with velocity v if r is the radius of orbit and m is mass...
- Q covalent bonds due to the high electric field 6 A change of 8 0 mA in the emitter current brings a change of 7 9 mA in the collector current...
- Q wavelength 26 The longest wavelength of the Lyman series for hydrogen atom is the same as the of a certain line in the spectrum of He when the electron makes...
- Q 1 Which of the following curves may represent the speed of the electron in a hydrogen atom as a function of the principal quantum number n
- Q Electron in a hydrogen atom first jumps from fifth excited state to third excited state and then from third excited state to second excited state The ratio of wavelengths emitted...
- Q a 2 C b 3 2 x 10 5 A sample of sodium has a mass of 46 g What is the mass of the same number of calcium atoms...
- Q A particle known as u meson has a charge equal to that of an electron and mass 208 times the mass of the electron It moves in a circular orbit...
- Q If the attractive potential between electron and proton were given by V r Vo In 5 To B n D 1 n where V To are constants the radius rn...
- Q 1992 1991 The Bohr radius of the fifth electron of phosphorous atom atomic number 15 acting as a dopant in silicon relative dielectric constant 12 is The w
- Q The energy of ground electronic state of hydrogen atom is 13 6 eV The energy of the first excited state will be a 54 4 eV b 27 2 eV...
- Q Of the following the one which has the de Broglie wavelength for the same speed is a electron c particle b proton d oxygen atom largest 2010
- Q A neutron moving with speed v makes a head on collision with a hydrogen atom in ground state kept at rest Find the minimum kinetic energy of the neutron for...
- Q A stationary hydrogen atom emits photon corresponding to the first line of Lyman series If R is the Rydberg constant and M is the mass of the atom then the...
- Q 1 K In case of LED if we increase forward applied voltage intensity of emitted light increases 1 Intensity of emitted light increases 2 Intensity of emitted light decreases 3...
- Q Let in energy level of a certain atom frequency v is emitted when the electron makes a transition from energy level of energy 3E to 2E The frequency emitted during...
- Q Marks Questions Determine the de Broglie wavelength of a proton whose kinetic energy is equal to the rest mass energy of an electron Mass of a proton 1836 times that...
- Q A uranium 238 nucleus initially at rest emits an a He particle with energy E The recoil speed of residual nucleus thorium 234 is Masses are same as their mass...
- Q For which one of the following Bo valid Singly ionised neon atom Ne Hydrogen atom Singly ionised helium atom He 2 3 4 Deuteron atom
- Q The radius of the 4th orbit of the electron will be smaller than its 8th orbit by a factor of A 2 C 8 B 4 D 16
- Q The mass of Li is 0 042 amu less than the sum of masses of its constituents The binding energy per nucleon is
- Q 2 13 Fig shows the results of an experiment involving photoelectric effect The graphs A B C D related the light beam having different wavelengths Can C D Accelerating Retarding...
- Q n An electron from various excited states of hydrogen atom emit radiation to come to the ground state Let be the de Broglie wavelength of the electron in the nth...
- Q prehension IV In a hypothetical positronium atom attraction between positron and electron bounds them if sum of magnitude o linear momenta of atomic particle is quantized in the integral steps...
- Q q For a non relativistic i e v c charged particle specific charge m constant
- Q 4 unit photo electric current is flowing the distance between source and cathode is 4 unit Now distance between source and cathode becomes 1 unit What will be photo electric...
- Q A particle of mass M at rest decays into two particles of masses m and m having non zero velocities The ratio of the de Broglie wavelengths of the particles...
- Q An electron in hydrogen atom after absorbing energy photons can jump between energy states n and n n n Then it may return to ground state after emitting six difference...
- Q 5 Which of the following is directly proportional to principal quantum number 1 Linear momentum 2 Kinetic energy 3 Total energy LA Mognatio homont muanh 21 n
- Q When the velocity of a relativistic charged particle increases it s specific charge Decreases 2 Increases 4 First decreases then increases 1 3 Remains same
- Q The transition from the state n 3 to n 1 in a hydrogen like atom results in ultraviolet radiation Infrared radiation will be obtained in the transition from AIPMT Mains...
- Q 2 V 3 4V 2 N 100 molecules of a gas have velocities 1 2 3 N km s respectively Then 1 rms speed and average speed of molecules are...
- Q 5 An electron of mass m with an initial velocity V V i V 0 enters an electric field E E Eo constant 0 at t 0 If o is...
- Q 1 The De Broglie wavelength associated with electrons revolving round the nucleus in a hydrogen atom in ground state will be mib E 1 0 3 2 3 3 3...
- Q Statement 1 When a neutron with energy 10 2eV collides with a hydrogen atom in ground state the electron will be excited to first excited state Statement 2 The collision...
- Q 37 Maximum frequency of emission is obtained for the transition 1 n 2 to n 1 2 n 6 to n 2 3 n 1 to n 2 4 n...
- Q There are two atoms of an element if one takes an electron from another 4eV is needed where as for the process A A 10eV is needed Ionisation potential and...
- Q 14 The de Broglie wavelength of a neutron in them equilibrium with heavy water at a temperature Kelvin and mass m is 1 3 H2h 2 leismal 3mkTbb h 3mkTusn...
- Q Who discovered photo electric effect 1 Hertz 2 Lenard 3 Hallwach The energy of a photon is equal to 3 kilo eV Calculate its linear momentum tic light of wave...
- Q The equivalent weight of H PO in following reaction is H PO Ca OH CaHPO 2H O 1 98 2...
- Q In which of the following cases the heavier of the two particle has a smaller De broglie wavelength A Both move with the same speed B Both move with the...
- Q A nucleus with mass number 220 initially at rest emits 30 an a particle If the Q value of the reaction is 5 5 MeV the kinetic energy of the...
- Q The momentum of a photon having energy equal to the rest mass energy of an electron is 1 2 73 x 10 22 kg ms 1 2 1 99 10...
- Q 400 124 Hydrogen atom in the ground state is excited by a monochromatic radiation of 975 Number of spectral lines in the resulting spectrum emitted will be a 3 c...
- Q 2C s 202 g H 12 0 H O 2CO g AH 787 kJ AH 286 kJ C H g 5 2 O2 g 2CO2 g H O l AH...
- Q 8 A transition metal X has a configuration Ar 3d5 in its 3 oxidation state Its atomic number is 1 22 2 26 3 28 4 19
- Q PHOTO ELECTRIC EFFECT The frequency of a photon associated with an energy of 3 31 eV is given h 6 62 x 10 34 Js 1 0 8 x 10...
- Q 84 A metal plate of area 1x10m is illuminated by a radiation of intensity 16mW m The work function of the metal is 5eV The energy of the incident photons...
- Q 25 A parallel beam of electrons travelling in x direction falls on a slit of width d see figure If after passing the slit an electron acquires momentum p in...
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