13 Jun 2026

Particle Physics Exam Quiz

Five standard particle physics MCQs for physics entrance practice.

particle-physics gate-2024 csir-net-2023 jest-2022

These are original exam-style practice questions based on common GATE, CSIR-NET and JEST particle physics patterns.

Q: [GATE 2024 style] A proton has quark content
A: $uud$
B: $udd$
C: $u\bar d$
D: $sss$
ANSWER: A
EXPLAIN: The proton is a baryon made of two up quarks and one down quark.
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Q: [CSIR-NET 2023 style] Lepton number is conserved in
A: ordinary weak interactions
B: all arbitrary mathematical transformations
C: only electromagnetic interactions
D: no beta decay process
ANSWER: A
EXPLAIN: Standard weak processes conserve total lepton number in ordinary reactions.
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Q: [JEST 2022 style] The photon is the gauge boson of
A: strong interaction
B: electromagnetic interaction
C: weak charged current only
D: gravity in the Standard Model
ANSWER: B
EXPLAIN: The photon mediates the electromagnetic interaction.
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Q: [GATE 2021 style] Baryons are particles made of
A: one quark and one antiquark
B: three quarks
C: two leptons
D: photons only
ANSWER: B
EXPLAIN: In the quark model, baryons contain three valence quarks.
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Q: [CSIR-NET 2020 style] The electric charge of an up quark is
A: $+2e/3$
B: $-e/3$
C: $+e$
D: $0$
ANSWER: A
EXPLAIN: Up-type quarks carry charge $+2e/3$.

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