Physics Practice MCQ Page 16

Multiple Choice questions for Physics in the sets of 10 each on one page with questions and answers. All sets are useful in the preparation of subject tests for employment or admission.
Question: 455   Kadiocarbon is produced in the atmosphere by the bombardment of
  1. Oxygen by high energy neutrons
  2. Oxygen by high energy protons
  3. Nitrogen by high energy protons
  4. Nitrogen by high energy neutrons
Question: 456   If, in a nuclear fission reaction involving neutron capture, the multiplication factor is greater than 1, then
  1. the process will ultimately come to a halt
  2. an explosion may result
  3. the reaction will be self sustaining with no explosion possible
  4. it is impossible to predict whether the reaction will halt or continue
Question: 457   The change in wavelength in Compton scattering depends upon
  1. angle θ of scattering
  2. atomic number of scatterer
  3. wavelength of incident X-rays
  4. nature of scatterer
Question: 458   Atomic explosion occurs due to
  1. uncontrolled chain reaction is fission
  2. uncontrolled chain reaction in fussion
  3. controlled chain reaction in fission
  4. controlled chain reaction in fussion
Question: 459   Which is an example of nuclear fusion?
  1. formation of water from hydrogen and oxygen
  2. formation of barium and krypton from uranium
  3. formation of helium from hydrogen
  4. none of these
Question: 460   A particle emitted by atomic nuclei that is not an elementary particle is the
  1. alpha particle
  2. electron
  3. positron
  4. π-meson
Question: 461   When we pass a radiation from a radioactive material through an electric field
  1. all three kinds of rays will be deflected
  2. only the gamma rays are deflected
  3. that α and β-rays are deflected
  4. only the α-rays are deflected
Question: 462   Which of the following may be used as a fuel fro nuclear reactors?
  1. lead
  2. aluminium
  3. cadmium
  4. plutonium
Question: 463   The forbidden energy gap of germanium at 0° K is
  1. 0.72 eV
  2. 7.2 eV
  3. 0.01 eV
  4. 1.10 eV
Question: 464   Which one of the following is not a characteristic of an ideal diode?
  1. forward resistance zero
  2. reverse resistance zero
  3. the capacitance shunting the diode is zero
  4. the characteristics are independent of temperature
Question: 465   The space charge current
  1. depends upon the temperature of the cathode
  2. depends upon the work function of the cathode
  3. is independent of the work function of the material of the cathode
  4. is independent of the geometry of the tube
Question: 466   In a triode-valve, the pale resistance is 1000 ohm and the anode load resistance is 30000 ohm. If the amplification factor is 36, then voltage gain is
  1. 9
  2. 36
  3. 27
  4. 108

Answers to the questions of Physics on this page

Following list gives the correct choice for the answer of the Physics mcqs.
455 . D       456 . B       457 . A       458 . A       459 . C       460 . A       461 . D       462 . D       463 . A       464 . C       465 . B       466 . C      

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