Description : In hydrogen atom, the electron is making `6.6xx10^(15) rev//sec` around the nucleus in an orbit of radius `0.528 A`. The magnetic moment `(A-m^(2)) wi
Last Answer : In hydrogen atom, the electron is making `6.6xx10^(15) rev//sec` around the nucleus in an orbit of radius `0. ... ` C. `1xx10^(-23)` D. `1xx10^(-27)`
Description : The electron with change `(q=1.6xx10^(-19)C)` moves in an orbit of radius `5xx10^(-11)`m with a speed of `2.2xx10^(6)ms^(-1)`, around an atom. The equ
Last Answer : The electron with change `(q=1.6xx10^(-19)C)` moves in an orbit of radius `5xx10^(-11)`m with a speed of `2. ... -3)A` C. `1.12xx10^(-9)A` D. `1.12A`
Description : Calculate the radius of the first and second orbit of sodium atom `(Z=11)`. `(h=6.6xx10^(-34) J s, e=1.6xx10^(-19) C` and `m=9.1xx10^(-31) kg.)`
Last Answer : Calculate the radius of the first and second orbit of sodium atom `(Z=11)`. `(h=6.6xx10^(-34) J s, e=1.6xx10^(-19) C` and `m=9.1xx10^(-31) kg.)`
Description : In a hydrogen atom, the electron makes about `0.6xx10^(16)` revolutions per second around the nucleus. Determine the average current at any point on t
Last Answer : In a hydrogen atom, the electron makes about `0.6xx10^(16)` revolutions per second around the nucleus. ... at any point on the orbit of the electron.
Description : An electron moving in a circular orbit of radius `r` makes `n` rotation per secound. The magnetic field produced at the centre has magnitude
Last Answer : An electron moving in a circular orbit of radius `r` makes `n` rotation per secound. The magnetic field produced at ... (r)` D. `(mu_(0)"ne")/(2r)`
Description : The angular momentum J of the electron in a hydrogen atom is proportional to `n^(th)` power of r (radius of the orbit) where n is :-
Last Answer : The angular momentum J of the electron in a hydrogen atom is proportional to `n^(th)` power of r (radius of the orbit ... B. `-1` C. `(1)/(2)` D. None
Description : The quantized Bohr orbit radius of electron in hydrogen atom is given by a) n2 r3 b) nr1 c) n2 r2 d) n2 r1
Last Answer : d) n2 r1
Description : Calculate the speed of the electron in the first Bohr orbit given that `h=6.6xx10^(-34) Js, m=9.11xx10^(-31) kg` and `e=1.603xx10^(-19) C`.
Last Answer : Calculate the speed of the electron in the first Bohr orbit given that `h=6.6xx10^(-34) Js, m=9.11xx10^(-31) kg` and `e=1.603xx10^(-19) C`.
Description : Electrons move at right angles to a magnetic field of `1.5xx10^(-2)` Tesla with a speed of `6xx10^(7)m//s`. If the specific charge of the electron is
Last Answer : Electrons move at right angles to a magnetic field of `1.5xx10^(-2)` Tesla with a speed of `6xx10^ ... C//kg`. The radius of the circular path will be
Description : 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
Last Answer : An electron moves in a circular orbit with a uniform speed `v`.It produces a magnetic field `B` at the centre of the ... (v)/(B))` D. `sqrt((B)/(v))`
Description : The value of first quantized Bohr orbit radius of hydrogen atom is a) 0.0053 nm b) 5.3 nm c) 0.053 nm d) 0.053 cm
Last Answer : c) 0.053 nm
Description : An alectron in a circular orbit of radius 0.05 mn performs `10^(16) "rev"//s.` the magnetic moment due to this ratation of electron is `(in A-m^(2)).`
Last Answer : An alectron in a circular orbit of radius 0.05 mn performs `10^(16) "rev"//s.` the magnetic moment due to ... `3.21xx10^(-24)` D. `1.26xx10^(-23)`
Description : The average current due to an electron orbiting the proton in the `n^(th)` Bohr orbit of the hydrogen atom is
Last Answer : The average current due to an electron orbiting the proton in the `n^(th)` Bohr orbit of the hydrogen atom ... `propn^3` C. `propb` D. none of these
Description : According to Bohr's theory of hydrogen atom, the angular momentum of the electron in the fourth orbit is given by (a) h/2p (b) 4h/p (c) h/p (d) 2h/p
Last Answer : Ans:(d)
Description : The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is?
Last Answer : 5x/36
Description : For the hydrogen atom, which series describes electron transitions to the N = 2 orbit? Is it the: w) Lyman series x) Paschen series y) Balmer series z) Pfund series
Last Answer : ANSWER: Y -- BALMER SERIES
Description : For the hydrogen atom, which series describes electron transitions to the N=1 orbit, the lowest energy electron orbit? Is it the: w) Lyman series x) Balmer series y) Paschen series z) Pfund series
Last Answer : ANSWER: W -- LYMAN SERIES
Description : An electron revolves in a circule at the rate of `10^(19)` rounds per second. The rquivlent current is `(e=1.6xx10^(-19)C)`
Last Answer : An electron revolves in a circule at the rate of `10^(19)` rounds per second. The rquivlent current is `(e=1.6xx10^( ... B. `1.6A` C. `2.0A` D. `2.6A`
Description : Calculate the separation of the particles and the binding energy of a positronium (an atom consisting of an electron and a position revolving around t
Last Answer : Calculate the separation of the particles and the binding energy of a positronium (an atom ... position revolving around their centre of mass).
Description : The total energy of revolving electron in an atom – (1) cannot be negative (2) can have any value above zero (3) can never be positive (4) will always be positive
Last Answer : (3) can never be positive Explanation: The total energy of a revolving electron in any orbit is the sum of its kinetic and potential energies. Energy of an electron at infinite distance from the ... and the energy of electron decreases and thus becomes negative. Thus, it can never be positive.
Description : The total energy of revolving electron in an atom------- A. Will always be positive B. Can never be positive (Answer) C. Can have any value above zero
Last Answer : B. Can never be positive (Answer)
Description : The total energy of revolving electron in an atom (1) cannot be negative (2) can have any value above zero (3) can never be positive (4) will always be positive
Last Answer : can never be positive
Description : The `6563 Å H_(2)` line emitted by hydrogen in a star is found to be red shifted by `15 Å`. Estimate the speed with which the star is receding from ea
Last Answer : The `6563 Å H_(2)` line emitted by hydrogen in a star is found to be red shifted by `15 ... the speed with which the star is receding from earth.
Description : Calculate the mass and mean density of the earth from the following data : `{:(,"Gravitational constant",(G),=6.6xx10^(-11)Nm^(2)kg^(-2)),(,"Radius of
Last Answer : Calculate the mass and mean density of the earth from the following data : `{:(,"Gravitational constant",(G),=6. ... to gravity",(g),=9.8ms^(-2)):}`
Description : An electron is travelling at right angles to a uniform magnetic field of flux density 1.2 mT with a speed of 8 × 106 m s-1, the radius of circular path followed by electron is A. 3.8 cm B. 3.7 cm C. 3.6 cm D. 3.5 cm
Last Answer : 3.8 cm
Description : An electron moves in a circular orbit of radius 10 cm with a constant speed of `4.0xx10^(6) ms^(-1)`. Determine the electric current at a point on the
Last Answer : An electron moves in a circular orbit of radius 10 cm with a constant speed of `4.0xx10^(6 ... Determine the electric current at a point on the orbit.
Description : Calculate the frequency of revolution of an electron in the first orbit of an aluminum atom. Given that mass of electron `=9x10^(-31) kg, e= 1.6 xx10^
Last Answer : Calculate the frequency of revolution of an electron in the first orbit of an aluminum atom. Given that mass of ... of the orbit `=0.2xx10^(-11) m`.
Description : An electron of energy 150 eV describes a circle in a magnetic field of 0.1 tesla. Calculate the radius of the curcle.
Last Answer : An electron of energy 150 eV describes a circle in a magnetic field of 0.1 tesla. Calculate the radius of the curcle.
Description : According to Bohr’s theory, the fourth stationary orbit of electrons in the hydrogen atom is a) 4 (0.053 nm) b) 9 (0.053 nm) c) 16 (0.053 nm) d) 25(0.053 nm)
Last Answer : c) 16 (0.053 nm)
Description : An electron is moving on a circular path of radius `r` with speed `v` in a transverse magnetic field B. e/m for it will be
Last Answer : An electron is moving on a circular path of radius `r` with speed `v` in a transverse magnetic field B. e/m for it ... /Br` B. `B/rv` C. Brv D. `vr/B`
Description : An electron and a proton are moving at the same speed in circular paths in the same uniform magnetic field. The radius of the path of the proton is one of the following. Is this radius: w) the same ... of the electron y) a little larger than that of the electron z) smaller than that of the electron
Last Answer : ANSWER: X -- ABOUT 2000 TIMES LARGER THAN THAT OF THE ELECTRON
Description : The de-Broglie wavelength of an electron moving in the nth Bohr orbit of radius ris given by
Last Answer : The de-Broglie wavelength of an electron moving in the nth Bohr orbit of radius ris given by A. `(2pir)/n` B. `npir` C. `(nr)/(2pi)` D. `(nr)/pi`
Description : The radius of the shortest orbit in a one-electron system is 18 pm. It may be
Last Answer : The radius of the shortest orbit in a one-electron system is 18 pm. It may be A. Hydrogen B. Deuterium C. `He^+` D. `Li^+`
Description : Calculate the radius of the first Bohr orbit of a `He^(+)` ion and the binding energy of its electron in the ground state.
Last Answer : Calculate the radius of the first Bohr orbit of a `He^(+)` ion and the binding energy of its electron in the ground state.
Description : A hydrogen like gas emits radiation of wavelengths `460 Å, 828 Å` and `1035Å`, only. Assume thar the atoms have only two excited states and the differ
Last Answer : A hydrogen like gas emits radiation of wavelengths `460 Å, 828 Å` and `1035Å`, only. Assume ... of the ground state and the first excited state.
Description : The binding energy of a satellite revolving around planet in a circular orbit is 3 × 10^9 J. Its kinetic energy is ______
Last Answer : The binding energy of a satellite revolving around planet in a circular orbit is 3 109 J. Its kinetic energy is ______ ... 10+9 J (D) 3 10+9 J
Last Answer : In a shaded pole single-phase motor, the revolving field is produced by the use of shading coils.
Description : The speed of hydrogen electron in the nth orbit is given by vn = a) 2λke2 / nh b) 2πke2 / λh c) 2πke2 / nh d) 2πke2 / h
Last Answer : c) 2πke2
Description : Whoever wants can advise the sick here
Last Answer : Abroad, cooperation and mutual assistance of patients with the same diagnosis is common, in the Czech Republic this type of communication is still lacking. These support groups serve as a source of information and ... home is good (fried tarantulas are good too - and do you eat them?). (tuxedo)
Description : If the value of `E=-78.4 "kcal//mol"`, the order of the orbit in hydrogen atom is-
Last Answer : If the value of `E=-78.4 "kcal//mol"`, the order of the orbit in hydrogen atom is- A. 4 B. 3 C. 2 D. 1
Description : Calculate the energy of hydrogen atom in the ground state given that the after Bohr orbit og hydrogen is `5xx10^(-11)m` and electronic charge is `1.6x
Last Answer : Calculate the energy of hydrogen atom in the ground state given that the after Bohr orbit og hydrogen is ` ... electronic charge is `1.6xx10^(-19) C`.
Description : A particle of charge `q` and mass `m` moves in a circular orbit of radius `r` with angular speed `omega`. The ratio of the magnitude of its magnetic m
Last Answer : A particle of charge `q` and mass `m` moves in a circular orbit of radius `r` with angular speed `omega`. The ... C. `q` and `m` D. `omega` and `m`
Description : Alpha rays are different from beta rays in one of the following ways. Are they different since: w) alpha rays are deflected in a magnetic field and beta rays are not x) alpha rays are ... negative charge z) alpha rays are produced within the nucleus and beta rays are produced outside the nucleus
Last Answer : ANSWER: Y -- ALPHA RAYS HAVE A POSITIVE CHARGE AND BETA RAYS HAVE A NEGATIVE CHARGE
Description : The wavelength of first member ofBalmer Series is 6563 Å. Calculate the wavelength of second member of Lyman series.
Last Answer : The wavelength of first member ofBalmer Series is 6563 Å. Calculate the wavelength of second member of Lyman ... B. 2050Å C. 6563Å D. none of these
Description : The total energy of the electron in the hydrogen atom in the ground state is -13.6 eV. Which of the following is its kinetic energy in the first excit
Last Answer : The total energy of the electron in the hydrogen atom in the ground state is -13.6 eV. Which of the following is its ... 6.8 eV C. 3.4 eV D. 1.825 eV
Description : The ionisation potential of hydrogen atom is `13.6` volt. The energy required to remove an electron in the `n = 2` state of the hydrogen atom is
Last Answer : The ionisation potential of hydrogen atom is `13.6` volt. The energy required to remove an electron in the `n = 2` ... . 13.6 eV C. 6.8 eV D. 3.4 eV
Description : There is a ring of radius r having linear charge density `lambda` and rotating with a uniform angular velocity `omega.` the magnetic field produced by
Last Answer : There is a ring of radius r having linear charge density `lambda` and rotating with a uniform angular velocity ` ... D. `(mu_(0)lambda)/(2omega^(2))`
Description : The size of chlorophyll molecule is (a) head 15 × 15 Å, tail 25 Å (b) head 20 × 20 Å, tail 25 Å (c) head 15 × 15 Å, tail 20 Å (d) head 10 × 12 Å, tail 25 Å.
Last Answer : (c) head 15 × 15 Å, tail 20 Å
Description : An α particle moves perpendicular to a constant magnetic field of strength 1.2 T in a circular path of radius 0.7 m. The speed of α particle in ms-1 is ______________ a) 2.7 × 107 b) 2.6 × 107 c) 3.2 × 107 d) 2.0 × 107
Last Answer : a) 2.7 × 107