Lesson 6.4.2
6.4.2 Fundamental particles Quiz: OCR Physics, Unit 5
20 questions
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Lesson 6.4.2, Fundamental particles: 20 multiple choice questions for the OCR Physics (H156), Unit 5: Particles and medical physics, written with Revision Ninja.
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The 20 questions
-
Which fundamental force affects hadrons but never affects leptons?
- Gravitational force
- Strong nuclear force
- Weak nuclear force
- Electromagnetic force
-
What is the simple quark model composition of a proton?
- udd
- uud
- uds
- uus
-
What is the simple quark model composition of a neutron?
- sss
- uud
- dds
- udd
-
What is the electric charge of an up quark in terms of elementary charge e?
- -1/3 e
- +2/3 e
- -2/3 e
- +1/3 e
-
What is the electric charge of a down quark in terms of elementary charge e?
- -1/3 e
- +2/3 e
- -2/3 e
- +1/3 e
-
What is the electric charge of an anti-down quark in terms of elementary charge e?
- +1/3 e
- -1/3 e
- -2/3 e
- +2/3 e
-
In beta-minus decay, which quark transformation occurs inside the decaying nucleon?
- d to s
- d to u
- u to s
- u to d
-
In beta-plus decay, which particle is emitted alongside the positron?
- Electron antineutrino
- Muon neutrino
- Tau neutrino
- Electron neutrino
-
Which particle is the antiparticle corresponding to the electron?
- Positron
- Antiproton
- Photon
- Neutrino
-
At what nucleon separation distance does the strong nuclear force become repulsive?
- Below 0.5 fm
- Between 1-3 fm
- Below 3.0 fm
- Above 3.0 fm
-
At what approximate separation distance is the strong nuclear force at maximum attraction?
- 10.0 fm
- 0.1 fm
- 1.0 fm
- 5.0 fm
-
How does the nuclear radius R depend on the nucleon number A?
- Proportional to A^2
- Proportional to A^(1/3)
- Proportional to A
- Proportional to A^(2/3)
-
If a nucleus has a nucleon number eight times larger, how much larger is its radius?
- 8 times
- 4 times
- 2 times
- 64 times
-
How does the mean density of a nucleus change as nucleon number increases?
- It remains constant
- Decreases with A
- Proportional to A^2
- Increases with A
-
Which of these fundamental particles is classified as a lepton?
- Neutrino
- Proton
- Neutron
- Pion
-
Which of these subatomic particles is classified as a hadron?
- Neutron
- Neutrino
- Positron
- Electron
-
Which particle is emitted alongside the electron during beta-minus nuclear decay?
- Gamma photon
- Electron neutrino
- Electron antineutrino
- Positron
-
What is the electric charge of an anti-up quark in terms of elementary charge e?
- +2/3 e
- +1/3 e
- -1/3 e
- -2/3 e
-
Compared to a standard proton, what property is opposite for an antiproton?
- Baryon magnitude
- Half-life
- Electric charge
- Rest mass
-
If a nucleus has a nucleon number of 27, what is its radius in terms of r0?
- 27 r0
- 3 r0
- 81 r0
- 9 r0
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