OCR A Level Physics

Topic Questions

6.8 Fundamental Particles

11 mark

Which column A, B, C or D, shows the correct sequence for the evolution of the Universe between the Big Bang and the formation of stars?

A B C D
Universe starts to
expand

quarks and leptons
form

hadrons form

nuclei form

atoms form
Universe starts to
expand

hadrons form

quarks and leptons
form

nuclei form

atoms form
quarks and leptons
form

nuclei form

Universe starts to
expand

atoms form

hadrons form
quarks and leptons
form

hadrons form

Universe starts to
expand

nuclei form

atoms form

Did this page help you?

11 mark

The table below shows the quark compositions of four particles A, B, C and D.

A B C D
u u d u d d u d s s s s


Which particle has a positive charge?

Did this page help you?

21 mark

Which statement is correct?

  • Hadrons are made up of protons and neutrons.

  • A positron and a proton are examples of leptons.

  • The positron and the electron have the same mass.

  • The weak nuclear force is responsible for alpha-decay.

Did this page help you?

31 mark

Which lepton is emitted in the decay of an up quark and is affected by a magnetic field?

  • neutrino

  • electron

  • positron

  • antineutrino

Did this page help you?