NTS Educators SSE (Science) Jobs Test With Answers

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NTS Educators SSE (Science) Jobs Test

Sr. # Questions Answers Choice
1 The average binding energy of a nucleon inside an atomic nucleus is about  8 MeV 8 eV 8 Joules 8 ergs
2 The de broglie wave corresponding to a particle of mass m and velocity v has a wavelength associated with it h/mv hm v mh/v m/hv
3 The structure of solids is investigated by using Cosmic Rays X-rays Intra red Radiation y-rays
4 The half life of a radio-isotope is 5 years The fraction of atoms decayed in this substance after 15 years will be 1 3/4 7/8 5/8
5 As the electron in Bohr orbit of hydrogen atom passes from stat n = 2 to n = 1 the kinetic energy K and potential energy U change as K two-fold,U also two-fold K four-fold,U also four-fold K four-fold,U two-fold
6 When a hydrogen atom is bombarded the atom is excited to the n = 4 state of hydrogen atom.The energy released when the atom falls from n = 4 state to the ground state is 1.275 eV 12.75 eV 5 eV 8 eV
7 The mass defect for the nucleus of helium is 0.0303 a.m.u What is the binding energy per nucleon for helium in MeV? 28 7 4 1
8 The nucleus 6C12 absorbs an energetic neutron and emits a beta particle (β) The resulting nucleus is <sub>7</sub>N<sup>14</sup> <sub>5</sub><span style="font-size: 14.44444465637207px;">B</span><sup>13</sup> <sub>7</sub><span style="font-size: 14.44444465637207px;">N</span><sup>13</sup> <sub>6</sub><span style="font-size: 14.44444465637207px;">N</span><sup>13</sup>
9 Electrons in the atom are held in the atom due to Coulomb forces Nuclear forces Gravitational forces Van der Waal's forces
10 In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie Ultraviolet Infra red Visible X-ray
11 To explain his theory Bohr used Conservation of linear momentum Conservation of angular momentum Conservation of quantum frequency Conservation of energy
12 The nuclear model of atom was proposed by J.J Thomson E.Rutherford Neil Bohr Summerfield
13 Who explained the origin of the Fraunhofer lines? Fraunhoffer Kirchhoff Fresnel Snell
14 Band spectrum in produced by H He H<sub>2</sub> Na
15 In which of the following states does the incandescent substance give continuous spectrum? Vapours in atomic state Vapours in molecular state Solid or fluid in bulk state Solid or fluid in plasma state
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