Home
Class 12
PHYSICS
Consider aiming a beam of free electrons...

Consider aiming a beam of free electrons towards free protons. When they scatter, an electron and a proton cannot combine to produce a H-atom,

A

because of energy conservation

B

without simultaneously releasing energy in the form of radiation

C

because of momentum conservation.

D

because of angular momentum conservation.

Text Solution

Verified by Experts

The correct Answer is:
A, B
When an electron beam is made incident on free protons, each electron coming successively, experiences an attractive type of resultant Colombian force which keeps on changing because of change in distance as well as change in arrangement of the charges. Because of this, the stream of electrons get scattered, so as to conserve energy. In these circumstances, proton and electron can not come extremely close to each other and unless they emit energy equal to magnitude of binding energy of H-atom in the form of radiation, they can not form H-atom.
`rArr` Thus, options (A) and (B) are correct.
Promotional Banner

Topper's Solved these Questions

  • ATOMS

    KUMAR PRAKASHAN|Exercise SECTION-C (NCERT EXEMPLAR SOLUTION) (Very Short Answer Type Questions)|5 Videos

  • ATOMS

    KUMAR PRAKASHAN|Exercise SECTION-C (NCERT EXEMPLAR SOLUTION) ( Short Answer Type Questions)|5 Videos

  • ATOMS

    KUMAR PRAKASHAN|Exercise SECTION-C (NCERT EXEMPLAR SOLUTION) (Multiple Choice Questions (MCQs))|7 Videos

  • ALTERNATING CURRENTS

    KUMAR PRAKASHAN|Exercise SECTION-D MCQs (COMPETITIVE EXAMS)|64 Videos

  • BOARD'S QUESTION PAPER MARCH-2020

    KUMAR PRAKASHAN|Exercise PART-B SECTION -C|4 Videos

Similar Questions

Explore conceptually related problems

When an electron and a proton are both placed in an electric field ........

Columb law for electrostatic force between two point charges and newton law for gravitational force between two the distance between the charges and masses respectively (a) compare the strength of these forces by determining the ratio of their magnitudes (i) for an electron and a proton and (ii) for two protons (b) estimate the acceleratons of electron and proton due to the electrical force oftheir mutual attarction when they are 1A (=10^(-10) m) a part (m_(p)=1.67xx10^(27) kg m_(e )=9.11xx10^(-31) kg)

Coulomb's law for electrostatic force between two point charges and Newton's law for gravitational force between two stationary point masses, both have inverse-square dependence on the distance between the charges and masses respectively, (a) Compare the strength of these forces by determining the ratio of their magnitudes (i) for an electron and a proton and (ii) for two protons. (b) Estimate the accelerations of electron an proton due to the electrical force of the mutual attraction when they are =10^(-10)m apart? (m_(p) = 1.67 xx 10^(-27) kg, m_(e) = 9.11 xx 10^(-31) kg)

The key feature of Bohr's spectrum of hydrogen atom is the quantization of angular momentum when an electron is revolving around a proton. We will extend this to a general rotational motion to find quantized rotational energy of a diatomic molecule assuming it to be rigid.The rule to be applied is Bohr's quantization condition. In a CO molecule, the distance between C (mass = 12 a. m. u ) and O (mass = 16 a.m.u) where 1 a.m.u = (5)/(3) xx 10^(-27) kg , is close to

The key feature of Bohr's spectrum of hydrogen atom is the quantization of angular momentum when an electron is revolving around a proton. We will extend this to a general rotational motion to find quantized rotational energy of a diatomic molecule assuming it to be rigid.The rule to be applied is Bohr's quantization condition. A diatomic molecule has moment of inertia I . By Bohr's quantization condition its rotational energy in the n^(th) level ( n = 0 is not allowed ) is

The key feature of Bohr's spectrum of hydrogen atom is the quantization of angular momentum when an electron is revolving around a proton. We will extend this to a general rotational motion to find quantized rotational energy of a diatomic molecule assuming it to be rigid.The rule to be applied is Bohr's quantization condition. it is found that the excitation from ground to the first excited state of rotation for the CO molecule is close to (4)/(pi) xx 10^(11) Hz then the moment of inertia of CO molecule about its center of mass is close to (Take h = 2 pi xx 10^(-34) J s )

An ionised H-molecule consists of an electron and two protons. The protons are separated by a small distance of the order of angstrom In the ground state