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MCQs

Total Questions : 148 | Page 13 of 15 pages
Question 121. Which of the following causes the phenomena of sputtering?
  1.    Primary ion gets embedded in the solid
  2.    Primary ion is elastically scattered
  3.    Primary ion is reflected
  4.    Primary ion is refracted
 Discuss Question
Answer: Option A. -> Primary ion gets embedded in the solid
Answer: (a).Primary ion gets embedded in the solid
Question 122. If the primary ion is elastically scattered, the kinetic energy of the reflected primary ion will depend on which of the following?
  1.    Charge of the primary ion
  2.    Charge of the surface ion
  3.    Mass of the surface ion
  4.    Number of surface ions
 Discuss Question
Answer: Option C. -> Mass of the surface ion
Answer: (c).Mass of the surface ion
Question 123. The kinetic energy of the primary ion should be in which of the following range?
  1.    0.1-4 keV
  2.    0.2-1 keV
  3.    0.4-2 keV
  4.    0.3-5 keV
 Discuss Question
Answer: Option D. -> 0.3-5 keV
Answer: (d).0.3-5 keV
Question 124. When a strong magnetic field is applied to the unpaired spins of an electron, the electrons will be split into two groups.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 125. If the population of ground state exceeds the population of the excited state a net absorption of __________ radiation takes place.
  1.    Infrared
  2.    Ultraviolet
  3.    Microwave
  4.    X-ray
 Discuss Question
Answer: Option C. -> Microwave
Answer: (c).Microwave
Question 126. If a weaker radiofrequency alternating magnetic field, having the frequency of precession of the electron is applied at right angles to fixed magnetic field, which of the following occurs?
  1.    Fragmentation
  2.    Scattering
  3.    Resonance
  4.    Absorption
 Discuss Question
Answer: Option C. -> Resonance
Answer: (c).Resonance
Question 127. The population ratio can be given by which of the following laws?
  1.    Bohr law
  2.    Beer-Lambert law
  3.    Kelvin law
  4.    Boltzmann law
 Discuss Question
Answer: Option D. -> Boltzmann law
Answer: (d).Boltzmann law
Question 128. When the electrons are aligned either parallel or antiparallel to the direction of the external magnetic field, the electrons will precess about the axis at a frequency that is proportional to which of the following?
  1.    Applied magnetic field
  2.    Electron magnetic moment
  3.    Applied magnetic field and electron magnetic moment
  4.    Neither applied magnetic field not electron magnetic moment
 Discuss Question
Answer: Option C. -> Applied magnetic field and electron magnetic moment
Answer: (c).Applied magnetic field and electron magnetic moment
Question 129. Which of the following is the binary equivalent of the decimal number 10?
  1.    1100
  2.    1010
  3.    1011
  4.    1110
 Discuss Question
Answer: Option B. -> 1010
Answer: (b).1010
Question 130. Two switches are in parallel and are connected with a lamp and supply in series. This represents which of the following logic gate?
  1.    AND gate
  2.    OR gate
  3.    EX-OR gate
  4.    NOT gate
 Discuss Question
Answer: Option B. -> OR gate
Answer: (b).OR gate

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