401 A device for producing high-velocity nuclei is ________________? Physics Medium Full question → A Cloud chamber B Linear accelerator C A mass spectrograph D Wilson cloud chamber
402 Pair production can take place only with_________________? Physics Medium Full question → A X-rays B Gamma rays C UV-rays D IR-rays
403 Pair production cannot take place in a vacuum as ________________? Physics Medium Full question → A Mass is not conserved B Energy is not conserved C Momentum is not conserved D The chargee is not conserved
404 Alpha particles possess greater penetration power than that of beta particles due to its_____________? Physics Medium Full question → A Smaller ionization power B Greater ionization power C Neither greater nor smaller ionization power D Same ionization power
405 Beta particles ionize an atom_________________? Physics Medium Full question → A Due to the electrostatic force of attraction B Due to the electrostatic force of repulsion C Due to a direct collision D Due to the gravitational force
406 Why gamma rays are used to kill bacteria to sterilize surgical equipment etc ? Physics Medium Full question → A Chargeless B Massless C Highly penetrating D All of above
408 X-rays are electromagnetic waves like________________? Physics Medium Full question → A Light waves B Heat waves C Microwaves D γ-rays
409 The most useful tracer is_________________? Physics Medium Full question → A Sr-90 B I-131 C CA-41 D C-14
410 Which one of the following possesses greater penetration power ? Physics Medium Full question → A α-rays B β-rays C γ-rays D Neutron-rays
411 Average distance covered by alpha particles in the air before its ionizing power ceases is called its_________________? Physics Medium Full question → A Trajectory B Range C Firing level D Limit
412 CFC is used in _________________? Physics Medium Full question → A Refrigeration B Aerosol spray C Plastic foam industry D All of above
413 An alpha particle can produce fluorescence in__________________? Physics Medium Full question → A ZnS B Barium platinocyanide C Calcium tungstate D All of above
414 Geiger counter is suitable for _________________? Physics Medium Full question → A Fast counting B Extremely fast counting C Slow counting D All situations
415 The penetration power of alpha particle as compared to beta particle is_______________? Physics Medium Full question → A 10 times more B 100 times more C 100 times less D 10 times less
416 Strontium-90 is used as __________________? Physics Medium Full question → A α-particle source B β-particle source C γ-rays source D Neutron source
417 An alpha particle in a single encounter__________________? Physics Medium Full question → A Loses a small fraction of its energy B Losses most of its energy C Loses no energy at all D Loses all of its energy
418 T.V sets and microwave ovens emit ___________________? Physics Medium Full question → A X-rays B α-rays C β-rays D γ-rays
419 Alpha particle ionizes an atom_________________? Physics Medium Full question → A Through direct collision B Through electrostatic attraction C Through electrostatic repulsion D All of above
420 The charge on alpha particles is________________? Physics Medium Full question → A Plus one B Plus two C Minus two D Minus one