Modern Physics MCQ

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• Which of the following elements is not suitable for the fabrication of a light emitting diode structure?
  ক

  Gallium phosphide

  খ

  Indium gallium nitride

  গ

  Germanium

  ঘ

  Gallium arsenide
• Radioactivity is measured by
  ক

  GM counter

  খ

  Polarimeter

  গ

  Calorimeter

  ঘ

  Colorimeter
• Which of the following is the oldest Nuclear research reactor of India?
  ক

  Dhruva

  খ

  Apsara

  গ

  Kamini

  ঘ

  Cirus
• If the size of the nucleus of an atom is compared with a cricket ball, then the radius of the atom is approximately equal to how many kilometres?
  ক

  0.5

  খ

  0.005

  গ

  0.05

  ঘ

  5
• Who among the following has explained the phenomenon of photoelectric effect?
  ক

  Max Planck

  খ

  Albert Einstein

  গ

  Neils Bohr

  ঘ

  Ernest Rutherford
• Which of the following is not a fuel element?
  ক

  Uranium

  খ

  Thorium

  গ

  Radium

  ঘ

  Helium
• When did India test its first atomic bomb?
  ক

  1976

  খ

  1981

  গ

  1968

  ঘ

  1974
• Which is the first nuclear reactor made in India?
  ক

  CIRUS

  খ

  Dhruva

  গ

  KAMINI

  ঘ

  Apsara
• Basic scientific principle behind a nuclear reactor is
  ক

  nuclear fusion

  খ

  controlled nuclear fusion

  গ

  uncontrolled nuclear fission

  ঘ

  controlled nuclear fission
• Which of the following is used in the preparation of Nuclear bombs?
  ক

  Zirconium

  খ

  Uranium

  গ

  Molybedenum

  ঘ

  Vanadium
• The function of heavy water in a nuclear reactor is to
  ক

  Slow down the speed of neutrons

  খ

  Increase the speed of neutrons

  গ

  Cool down the reactor

  ঘ

  Stop the nuclear reaction
• Heavy water is used as a moderator in a nuclear reactor. The function of the moderator is
  ক

  to control the energy released in the reactor

  খ

  to absorb neutrons and stop the chain reaction

  গ

  to cool the reactor

  ঘ

  to slow down the neutrons to thermal energy
• X-rays are
  ক

  deflected by an electric field but not by a magnetic field

  খ

  deflected by a magnetic field but not by an electric field

  গ

  deflected by both a magnetic field and an electric field

  ঘ

  not deflected by an electric field and a magnetic field
• Which one of the following is a nuclear research reactor operated by Bhabha Atomic Research Centre?
  ক

  Shiva

  খ

  Narayana

  গ

  Dhruva

  ঘ

  Vishnu
• What is the source of electrical energy in an artificial satellite?
  ক

  Solar cells

  খ

  Mini nuclear reactor

  গ

  Dynamo

  ঘ

  Thermopile
• As of November 2020, how many nuclear power reactors are operating in India?
  ক

  20

  খ

  23

  গ

  22

  ঘ

  21
• In which year did India conduct its second nuclear test in Pokhran?
  ক

  1998

  খ

  2003

  গ

  1996

  ঘ

  2001
• In which year was India's first nuclear reactor formally inaugurated by Prime Minister JL Nehru?
  ক

  1967

  খ

  1965

  গ

  1955

  ঘ

  1957
• Which statement is not associated with nuclear fission?
  ক

  Neutron-induced nuclear reaction

  খ

  Energy generation in stars

  গ

  Source of energy in nuclear reactor that produces electricity

  ঘ

  Enormous energy is released in an atom bomb
• Which one of the following is not a property of the X-rays?
  ক

  They are deflected by electric fields

  খ

  They are not deflected by magnetic fields

  গ

  They have high penetration length in matter

  ঘ

  Their wavelength is much smaller than that of visible light