Lesson 3.2.1.7
3.2.1.7 Applications of conservation laws Quiz: AQA Physics, Unit 2
20 questions
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Lesson 3.2.1.7, Applications of conservation laws: 20 multiple choice questions for the AQA Physics (7408), Unit 2: Particles and radiation, written with Revision Ninja.
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The 20 questions
-
Which quantity is strictly conserved in every particle interaction?
- Strangeness
- Quark flavour
- Number of pions
- Electric charge
-
In which fundamental interaction is strangeness always conserved?
- Weak interaction
- Strong interaction
- Beta-minus decay
- Electron capture
-
What change of strangeness can occur in a weak interaction?
- always +1
- 0, +1 or -1
- +2 or -2 only
- always -1
-
Besides electric charge, which quantities are conserved in all particle interactions?
- Mass and force
- Spin and strangeness
- Energy and momentum
- Power and velocity
-
Which lepton is emitted alongside an electron in beta-minus decay?
- Muon neutrino
- Electron antineutrino
- Muon antineutrino
- Electron neutrino
-
Which quark change occurs during beta-plus decay?
- Strange to up
- Up to down
- Down to strange
- Down to up
-
What happens to the baryon number in beta-minus decay?
- It increases by 1
- It decreases by 1
- It becomes zero
- It is unchanged
-
Is the interaction pi- + p -> n + pi0 allowed by conservation laws?
- No, strangeness non-conserved
- No, charge non-conserved
- No, baryon non-conserved
- Yes, allowed
-
Which particle completes p to n + ? while conserving charge and baryon number?
- e-
- pi0
- pi+
- pi-
-
Which interaction governs the decay K- to pi- + pi0?
- weak interaction
- gravitational interaction
- strong interaction
- electromagnetic interaction
-
What is the lepton number of the antineutrino emitted in beta-minus decay?
- +1
- +2
- 0
- -1
-
Which particle is emitted with the positron in beta-plus decay (p to n + e+ + ?)?
- electron neutrino
- W boson
- electron antineutrino
- photon
-
A particle at rest with rest energy 1.02 MeV decays into two equal-energy photons. What is the energy of each photon?
- 2.04 MeV
- 0.51 MeV
- 0.255 MeV
- 1.02 MeV
-
A stationary neutral particle decays into two particles. If one moves right, how does the second move?
- Left, equal momentum
- Right, zero momentum
- Left, greater momentum
- Right, equal momentum
-
What is the missing particle in pi- + p to n + X?
- electron
- pi+
- pi0
- antiproton
-
Which conservation law is violated if a neutron decays into only a proton and an electron?
- Baryon number
- Charge
- Strangeness
- Lepton number
-
The hypothesis of the neutrino was proposed to account for the conservation of which quantity?
- Charge
- Strangeness
- Baryon number
- Energy
-
How does the number of down quarks change during beta-minus decay?
- Remains unchanged
- Increases by 1
- Decreases by 2
- Decreases by 1
-
Which interaction mediates kaon decay into pions where strangeness is not conserved?
- Strong interaction
- Weak interaction
- Gravitational interaction
- Electromagnetic interaction
-
Which quantity is NOT always conserved in a weak interaction?
- electric charge
- baryon number
- lepton number
- strangeness
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