More questions
1 The spin of a particle is known to be +1/2. Which of the following statements could not be correct?.The particle obeys the Pauli exclusion principle.
The particle is a lepton
The particle is a hadron.
The particle is a meson.
2 When an electron and a positron interact two gamma ray photons are produced. Single gamma ray production does not take place because....... electrons and positrons have the opposite charge.
... energy and momentum must both be conserved.
... the mass loss is insufficient.
... electrons and positrons have the same mass.
3 The exclusion principle is named after ....... Heisenberg.
... Fermi.
... Pauli.
... Gell-Mann.
4 Quarks have....... one third the charge of the electron.
... multiples of one third the charge of the electron.
... multiples of one half the charge of the electron
... no charge.
5 Gell-Mann did for particle physics what ................... did for Chemistry.... Dalton.
... Boyle.
... Mendeleeve.
... Lavoisier.
6 A proton.is a ...... fermionic hadron.
... bosonic hadron.
... meson.
... lepton.
7 Which of the following particles is the most stable?... an isolated neutron.
... a pion.
... an alpha particle.
... a kaon.
8 Quarks are ...... leptons.
... hadrons.
... mesons.
... fermions.
9 Which completed statement is not true?All known decays conserve ...
... charge.
... lepton number.
... mass.
... baryon number.
10 The quark configuration of the proton is ...... uud
.. udd
.. uuu
.. ddd