Practise

Question bank

Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

TopicSkillDifficulty

12 questions

SA-PX-PI-0011 markL1 FoundationCalculatorAntimatter

The rest energy of an electron is

0.511

MeV. Calculate the minimum photon energy, in MeV, needed to produce an electron–positron pair.

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SA-PX-PI-0031 markL1 FoundationCalculatorExchange particles

The exchange particle of the weak interaction in β⁻ decay is the

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SA-PX-PI-0081 markL1 FoundationCalculatorAntimatter

A particle and its antiparticle have

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SA-PX-PI-X011 markL1 FoundationCalculatorAntimatter

A muon has rest energy

105.7

MeV. Calculate the minimum photon energy, in MeV, to produce a muon–antimuon pair.

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SA-PX-PI-X021 markL1 FoundationCalculatorExchange particles

The strong interaction between quarks is carried by

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SA-PX-PI-X031 markL1 FoundationCalculatorConservation laws

State the baryon number of a meson.

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SA-PX-PI-X041 markL1 FoundationCalculatorAntimatter

State the charge of an antiproton, in units of

e

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SA-PX-PI-0022 marksL2 StandardCalculatorAntimatter

An electron and a positron at rest annihilate into two photons. Calculate the frequency of each photon, in units of

10^{20}

Hz. (

0.511

MeV

=8.19\times10^{-14}

h=6.63\times10^{-34}

J s)

Salam Academy Original Practice · Proposed mark scheme

SA-PX-PI-0041 markL2 StandardCalculatorConservation laws

In β⁻ decay,

n\to p+e^-+X

. Particle

X

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SA-PX-PI-0051 markL2 StandardCalculatorConservation laws

Which reaction is forbidden because baryon number is not conserved?

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SA-PX-PI-0061 markL2 StandardCalculatorAntimatter

The rest energy of a proton is

938

MeV. Calculate the minimum photon energy in MeV to produce a proton–antiproton pair.

Salam Academy Original Practice · Proposed mark scheme

SA-PX-PI-0071 markL3 ExamCalculatorConservation laws

A kaon

K^0

(

S=+1

) decays into

\pi^++\pi^-

. This decay must be

Salam Academy Original Practice · Proposed mark scheme