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Unit 28: Particles Physics
Multiple Choice Questions
SECTION A
Multiple Choice Questions (MCQs)
Choose the correct answer:1. The Standard Model classifies elementary particles into two main groups:
a) Baryons and Leptons
b) Fermions and Bosons ✔
c) Quarks and Gluons
d) Hadrons and Mesons
2. The following is NOT a flavor of quark:
a) Up
b) Down
c) Electron ✔
d) Top
3. The charge of an up quark is:
a) +1/2 e
b) -1/2 e
c) +2/3 e ✔
d) -2/3 e
4. The concept of 'quark confinement' implies that:
a) Quarks cannot exist as free particles outside of hadrons. ✔
b) Quarks are always found in pairs with opposite charges.
c) Quarks have a strong affiinty for gluons.
d) Quarks are the fundamental building blocks of all matter.
5. The primary role of the Higgs boson in the Standard Model is:
a) Mediating electromagnetic interactions
b) Providing mass to other particles ✔
c) Transmitting the strong nuclear force
d) Creating dark matter
6. According to the Standard Model, the term "color' refers to:
a) Visible light spectrum
b) Charge property of quarks ✔
c) Mass of particles
d) Spin of particles
7. A particle made up of a quark and an antiquark is called:
a) Lepton
b) Baryon ✔
c) Meson
d) Neutrino
8. An elementary particle that feels all three fundamental forces (electromagnetic, weak, and strong nuclear forces) is:
a) Lepton
b) Quark ✔
c) Electron
d) Neutrino
9. The primary function of a Geiger-Mtiller counter in particle physics is to:
a) Measure the velocity of particles
b) Detect and count ionizing radiation ✔
c) Create antimatter particles
d) Generate magnetic fields
10. In a Geiger-Muller counter. the gas commonly used to detect ionizing radiation is:
a) Oxygen
b) Neon
c) Argon ✔
d) Helium
Note: (Although all the three are used in Geiger-Muller counter, but:
Argon: Optimal ionization properties, stable, widely used.
Neon and Helium: Less efficient ionization, higher ionization potential, so less practical for standard detection.)
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