Physics question and answers for July 01, 2023
- Q Question No 30 The difference between n 1 th Bohr radius and nth Bohr radius is equal to the n 1 th Bohr radius The value of n is O...
- Q If the scattering intensity of a liquid is 8 units at a wavelength of 500 nm then the scattering intensity at a wavelength of 400 nm will be approximately A...
- Q than 90 is RT Pg 416 ested that 7 An electron in a hydrogen atom makes a transition from n n to n n The time period of revolution of...
- Q A hydrogen atom initially in the ground state absorbs a photon and is excited to n 4 level then the wavelength of photon is nearly INCERT Pg 427 790 A...
- Q 13 lonization potential of hydrogen atom is 13 6 eV Hydrogen atoms in the ground state are excited by monochromatic radiation of photon energy 12 1 eV According to Bohr...
- Q A cathode ray oscilloscope CRO is a device which convertes electrical signals into an active graphical representation on a fluorescent screen The x axis is always time axis where the...
- Q The radionuclide 1 C dacays by B emission Write symbolically this decay process Given that Calculate the Q value m C 11 011434 u m 1 B 11 009305 u...
- Q An electromagnetic radiation whose electric component varies with time as E Eo 1 coswt cos wot w 6 x 10 5 rad s wo 2 8 x 10 4 rad...
- Q The ionisation energy of a hydrogen like Bohr atom is 4 Rydbergs The wavelength of radiation emitted when the electron jumps from the first excited state to the ground state...
- Q An electron in a hydrogen atom makes a transition from n N to n N The frequency of the electron in the final state is eight times that in initial...
- Q An electron is moving with an initial velocity v v i and is in a magnetic field B B j Then it s de Broglie wavelength 1 remains constant B...
- Q What is the value of the de Broglie wavelength of an electron when it is accelerated from rest through a potential difference of 150 V Only one correct answer A...
- Q 2 In a hydrogen atom if the potential energy of first excited state is taken as reference zero potential energy then total energy of ground state will be written as...
- Q In alpha particle scattering experiment the perpendicular distance b of initial velocity vector of the a particle from the centre of nucleus is equal to where E is initial kinetic...
- Q The de Broglie wavelength of the electron in the ground state of the hydrogen atom is radius of the first orbit of hydrogen atom 0 53 1 1 67 3...
- Q 14 Two unpaired electrons present in carbon atom are different with respect to their A Principle quantum number B Azimuthul quantum number D Spin quantum number C Magnetic quantum number...
- Q An electron is accelerated through a potential 50 difference of 10000 V The de Broglie wavelength of the electron is 1 0 123 3 0 186 2 0 356 4...
- Q Directions In the following question a statement of assertion A is followed by a statement of reason R Mark the correct choice as a If both assertion and reason are...
- Q Choose CORRECT statement A Electron proton which are accelerated through same potential difference from rest will have same de broglie 5 8 4 PORT AND FIE wavelength 24e4 B Proton...
- Q 4 tan 1 1 3 3 IN 37 A hydrogen like atom of atomic number z is in an excited state of quantum number 2n It can emit a photon...
- Q In a hypothetical system a particle of ma and charge 3q is moving around a heavy particle charge q Assume that E model is applicable to this system then vel...
- Q A hydrogen atom and Li ion are both in th econd excited state If L and L are the espective electronic angular momenta and E and E their respective energies...
- Q energy decrease If we have to apply Bohr model to a particle mass m and charge q moving in a plane und the influence of a magnetic field B the...
- Q 13 Physi If in hydrogen atom radius of n Boh 4 Time period and frequency of revol electron in n orbit are T and f ch correct option T A...
- Q 5 A photon of energy 70 eV collides with He ion Due to this collision He atom gets ionized The maximum kinetic energy of the emitted electron is 1 13...
- Q fork e first and rge ion 4 200 Q 38 Velocity of electron in the ground state of hydrogen atom is given by where r is radius of first orbit...
- Q Q 1 MULTIPLE CHOICE Suppose the potential energy between electron and proton at separation is given by U klogr where k is constant If mass of electron is m then...
- Q 7 How much energy is required to take a hydroger atom from its ground state to excited state where it subsequently emits radiation of six differen wavelength 1 10 2...
- Q 19 If the wavelength of first line of Blamer series is 6563 The wavelength of first line of Lyman series and Rydberg s constant respectively will be a 1215 4...
- Q Calculate for He i radius of the first Bohr orbit ii velocity of electron moving in the first orbit iii orbital frequency in the first orbit iv kinetic energy and...
- Q 8 The wavelength of the short radio waves microwaves and ultraviolet waves are A A respectively Arrange them in decreasing order 2 2 2 2 4 2 1 3
- Q 11 Energy levels A B and C of a certain atom correspond to increasing values of energy i e EA EB Ec If 2 and 23 are wavelengths of radiations...
- Q 3 1 4 Hz 4 1 47 Hz 3 Energy required for the electron excitation in Li from the first to the third Bohr orbit is 1 12 1 eV...
- Q 47 The total energy of a hydrogen atom in its ground state is 13 6 eV If the potential energy in the first excited state is taken as zero then...
- Q 24 If vis the velocity of an electron in first excited state of H atom and fis the frequency of revolution then the de Broglie wavelength of the electron will...
- Q Kinet energ Calculate the de Broglie associated with it h 6 6 x 10 34 Js m 9 1 x 10 31 kg 1 5 47 2 10 9 2...
- Q Consider the two level system shown in Fig with E 13 6 eV and E2 3 4 eV Assume A216 x 10 s a What is the frequency of light...
- Q Atoms of a hydrogen like gas are in a particular excited energy level When these atoms de excite they emit photons of different energies Maximum and minimum energies of emitted...
- Q In a hypothetical atom a negatively charged particle having a charge of magnitude 3e and mass 3m revolves around a proton Here e is the electronic charge and m is...
- Q 19 The diagram shows the path of four a particles of the same energy being scattered by the nucleus of an atom simultaneously Which of these is are not physically...
- Q The binding energies of the atom of elements A B are Ea Eb respectively Three atoms of the element B fuse to give one atom of element A This fusion...
- Q The ratio of kinetic energy of an electron and the energy of a photon both having the same wavelength is 1 Proportional to the wavelength of the photon 2 Proportional...
- Q hat instant getting d e 1 nother stable lly only X is of X and Y is 31 At t 0 light of intensity 10 2 photons s m of...
- Q 21 A 100 eV electron collides with a stationary helium ion He in its ground state and exits to a higher level After the collision He ions emits two photons...
- Q A nucleus with mass number A 220 decays by a emission The energy released is 5 5 MeV a good estimate for the kinetic energy of the x particle will...
- Q An electron moves in a circular orbit with a uniform speed v It produces a magnetic field B at the centre of the circle The radius of the circle is...
- Q Example 14 10 For the damped oscillator shown in Fig 14 20 the mass mof the block is 200 g k 90 N m and the damping constant b is...
- Q Find the magnetic moment of an electron of charge e and mass m moving in a Bohr D orbit of radius 2 044 in an Hydrogen atom
- Q E C B i A A DE M The above is a plot of binding energy per nucleon Eb against the nuclear mass M A B C D E F...
- Q SolveLancer Test What percent of velocity would be required to be gained lost by an electron present in 2nd orbit in an atom of hydrogen to excite the electron to...
- Q 175 The Schrodinger wave equation for hydrogen atom is 3 2 Y radial 1 Z 16 4 ao 2Zr where ao and Z are the constant in which answer can...
- Q 2 An electron mass 9 1x10 kg is sent into an electric field of intensity 9 1x10 newton coulomb The acceleration produced is 1 1 6 10 8 m 22...
- Q In Bohr s theory for hydrogen like atoms For the higher atomic number radius of the nth orbit is higher O For the higher quantum number velocity of electron in...
- Q The frequencies for series limit of Balmer and Paschen series respectively are v and v If frequency of first line of Balmer series is v then the relation between v...
- Q Total number of air molecules inclusive of oxygen nitrogen water vapour and other constituents in a room of capacity 25 m at a temperature of 27 and 1 atm pressure...
- Q An electron of mass m and a photon have same energy E The ratio of de Broglie wavelengths associated with them is Question Type Single Correct Type 1 2 3...
- Q Select the incorrect statement O Zn 2 Cut and Cu have same number of d electrons O 1 Electron having n 4 2 m 0 s values of quantum number...
- Q The energy the magnitude of linear momentum magnitude of angular momentum and orbital radius of an electron in a hydrogen atom corresponding to the quantum number n are E p...
- Q Calculate the ratio between the radius of the radium nucleus and the radius of the oxygen nucleus The atomic mass of the radium nucleus is 4 226 and the atomic...
- Q Match the statements given in List I with their corresponding possible results in List II List I P If photons of ultraviolet light of energy 12 eV are incident on...
- Q er n g 6 Q 15 An electron in H atom makes a transition from n 3 to n 1 The recoil momentum of H atom will be 1 6...
- Q Which of the following may be an incorrect statement regarding cathode ray discharge tube O Presence of negative charge in cathode rays The magnetic field deflects these rays OIt needs...
- Q 19 A metal plate weighing 750 g is to be electroplated with 0 05 of its weight of silver If a current of 0 8 A is used find the...
- Q A hydrogen atom in its ground state is irradiated by light of wavelength 970 A Taking hc e 1 237 x 10 eVm and the ground state energy of hydrogen...
- Q An excited free hydrogen at rest undergoes transition from n 3 to n 1 emitting photon of wavelength then In above question of photon is emitted opposite to direction of...
- Q The allowed energy levels of electrons in a Hydrogen atom are given by E 13 6 n eV F electronic transition in Hydrogen atom what is the maximum frequency of...
- Q 4 None of these An element have two isotopes having m and m The relative abundances on isotopes are x and 100 x The a mass of element will be...
- Q b A system has four non degenerate single particle energy states 0 E 2E and 3E The system has four particles with total energy 6E List the possible configurations of...
- Q A gas mixture contain 1 g H and 1 g He if temperature of gas mixture is increased from 0 C to 100 C at isobaric process Then find given...
- Q Q1 If 13 6 eV energy is required to separat a hydrogen atom into a proton and electron then the orbital radius of electron in hydrogen a 5 3 x...
- Q energy of the molecules of one mole of oxygen to that of one mole of hydrogen both kept at 100 C is A 16 1 B 4 1 C 1...
- Q No 2 To explain the fine structure of the spectrum of hydrogen atom we must consider Finite size of the nucleus The presence of neutrons in the nucleus Spin angular...
- Q In Bohr s model of the hydrogen atom which of the following statement is incorrect Tagsfag f A The radius of the nth orbit is proportional to n nth B...
- Q Two bubbles coalesce to form a single bubble If V is the subsequent change in the volume of contained air and S the change in total surface area T is...
- Q 48 Sodium has body centred packing Distance between two nearest atoms is 3 7 The lattice parameter is a 6 8 c 3 0 9 A block of mass M...
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