Physics FSC Part 2 Online MCQ's Test With Answers

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Physics FSC Part 2 Online MCQ's Test

Sr. # Questions Answers Choice
1 Laser is a beam of light which is Monochromatic Coherent Unidirectional All of these
2 Helium Neon Laser Beam emitted from discharge tube has a colour. Blue Green Red Black
3 Laser can be made by creating. Meta stable Population inversion Excited state All of these
4 When meta I is heated sufficiently electrons are given off by the metal. This phenomenon is known as. Photoelectric effect Piezo electric effect Thermionic emission Secondary emission
5 Bremsstrahlung radiation are examples of Atomic spectra Molecular spectra Continuous spectra Discrete spectra
6 X- ray diffraction reveals that these are Particle type Wave type Both wave and particle None of above
7 Kx -Xrays are produced due to transition of electron from. K to L shell L to K shell M to K shell M to L shell
8 In Helium Neon laser, discharge tube is filled with Neon gas. 10% 15% 85% 90%
9 The rest mass x ray photon is Infinite Zero 1.67 X<sup>-17</sup> kg All of the above
10 Which is not true for X rays X rays are not defected by electric field X rays are polarized X rays consist of electromagnetic waves X rays can be diffracted by grating
11 Production of x rays is reverse process of Photo electric effect Compton effect An nihilation Pair production
12 Photons emitted in inner shell transition are. Continuous X -rays Discontinuous X rays Characteristic X rays Energetic X rays
13 In an electronic transition atom cannot emit.
 Infrared radiations Visible radiations Ultraviolet radiations Gama radiations
14 An electron in H -atom is excited from ground state n=4 , How many spectral lines are possible in this case. 6 5 4 3
15 Radius of first Bohr's orbit is. 0.053 nm 0.053 mm 0.053 micro meter 0.053 m
16 The following gas was identified in the sun using spectroscopy Hydrogen Helium Carbon Nitrogen
17 We can find from de Broglie formula Wavelength Amplitude Speed of wave Frequency of wave
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