Fundamental Particles (OCR A Level Physics)

Exam Questions

4 mins4 questions
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

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    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?

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      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.

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      31 mark

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

      • neutrino

      • electron

      • positron

      • antineutrino

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