Physics ICS Part 2 Online MCQ's Test With Answers

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Physics ICS Part 2 Online MCQ's Test

Sr. # Questions Answers Choice
1 Mass equivalent of 931 MeV energy is: 6.02 x 10<sup>-23</sup> kg 1.766 x 10<sup>-27</sup>kg 2.67 x 10<sup>-29</sup>kg 6.02 x 10<sup>-87</sup>kg
2 How many neutrons are there in the nuclide Zn66? 22 30 36 66
3 The bnding energy for nucleus A is 7.7 Me V and that for nucleus B is 7.8 MeV. Which nucleus has the larger mass? Nucleas A Nucleus B Less than nucleus None of these
4 Laser is a device which can produce: Intense beam of light Coherant beam of light Monochromatic beam of light All of the above
5 Target material used in x-rays tube have following properties. High atomic number and high melting pouint High atomic number and low melting pouint Low atomic number and low melting pouint High atomic number only
6 Frequency of x-rays depends upon. Number of electrons striking target Accelerating potencial Nature of the target Both B and C
7 When an electron in an atom goes from a lower to higher orbit its: K.E increases , P.E decreases K.E increases , P.E increases K.E decreases , P.E increases K.E decreases , P.E decreases
8 In the Bohr's model of the hydrogen atom, the lowest orbit corresponds to: Infinite energy Maximum energy Minimum energy Zero energy
9 In according with Bohr's theory the K.E of the electron is equal to: ke<sup>2</sup>/2r Ze<sup>2</sup>/r Ze<sup>2</sup>/r<sup>2</sup> Ze<sup>2</sup>/2r<sup>2</sup>
10 The Balmer series is obtained when all the transition of electrons terminate on 1<sup>st</sup> orbit 2nd orbit 3rd orbit 4th orbit
11 For an atom of hydrogen atom the radius of the first orbit is given by: H/me<sup>2</sup> me/4h<sup>2</sup> h2/4<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">π<sup>2</sup> kme<sup style="">2</sup></span> h<sup>2</sup> me<sup>2</sup>
12 If 13.6 eV energy is required to ionize the hydrogen atom, then the required energy to remove an electron from n=2 is: 10.2 eV 0 eV 3.4 eV 6.8 eV
13 An electron miroscope emplys which to one of the following particles? Electron ahve a wave nature Electrons can be focused by an electric field Electrons can be focused by a magnetic field All of the above
14 We can never accurately describes all aspects of sbatomic particles simulatanously. It is correct according to: Uncertainity Priciple De-broglie Theory Einstin Theory Photo electric effect
15 The position has charge which is in magnitude equal to the charge on Electron Proton <span style="font-weight: bold; color: rgb(106, 106, 106); font-family: arial, sans-serif; font-size: small;">β particle</span> All
16 Pair production cannto take place in vacuum because : Mass in not conserved Momentum is not conserved Energy is not conserved Charge is not conserved
17 Pair production occurs only when energy of photon is at least equal in: 1.02keV 1.02 eV 1.02 MeV 1.02 GeV
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