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OCR A Level Physics

Topic questions Particle physics Particle physics

Particle physics

6 questions · 47 marks · about 1 hour

Particle physics questions

TopicParticle physics

OCR H556 Particle physics 6 questions

Exploring Physics June 2024, Question 13 1 mark

A sub‑atomic particle has a positive charge.

Which type of particle is it?

A anti‑proton

B down quark

C neutrino

D positron

Your answer

[1]
Reveal mark scheme Mark scheme for question 13

Exploring Physics June 2024, Question 20 13 marks

Figure for question 20
(a)

Explain what is meant by nuclear binding energy of a nucleus.

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(b)
Figure for question 20
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(c)
Figure for question 20
(c)(i)

Explain why isotopes with low mass numbers, such as hydrogen, are those which undergo nuclear fusion.

[1]
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(c)(ii)

Use the diagram given at the start of this question to show that, for the reaction of deuterium and tritium, the energy released in each fusion event is approximately 3 × 10–12 J.

[3]
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(c)(iii)
Figure for question 20 Figure for question 20
[2]
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(d)
Figure for question 20
(d)(i)

Determine the charge of the missing particle.

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(d)(ii)

The missing particle is a lepton. Name this lepton.

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(d)(iii)

In the fusion reaction above, determine the total number of up quarks at the start of the reaction.

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(e)
Figure for question 20
[2]
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Exploring Physics June 2022, Question 20 10 marks

(a)

Deuterium is an isotope of hydrogen. A nucleus of deuterium has a proton and a neutron.

Describe the nature and range of the two forces acting between these two hadrons.

[4]
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(b)
Figure for question 20
[6]
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Exploring Physics November 2020, Question 12 1 mark

The table below shows the quark compositions of four particles A, B, C and D.

ABCD
u u du d du d ss s s

Which particle has a positive charge?

Your answer

[1]
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Exploring Physics November 2020, Question 21 15 marks

(a)
Figure for question 21
[4]
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(b)

The half-life of the isotope carbon-14 is 5700 years (y).

(b)(i)
Figure for question 21
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(b)(ii)

Carbon-dating is a technique used to date an ancient wooden axe. The ratio of carbon-14 to carbon-12 in the axe material is 78% of the current ratio of carbon-14 to carbon-12 in a living tree.

Calculate the age in years of the wooden axe.

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(b)(iii)

State one assumption made in the calculation in (ii).

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(c)
Figure for question 21 Figure for question 21
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Exploring Physics June 2017, Question 23 7 marks

(a)

Describe the nature of the strong nuclear force.

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(b)(i)

Name a hadron found in the nucleus of an atom and state its quark combination.

name of hadron:........ quark combination:........

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(b)(ii)

Write a decay equation in terms of a quark model for beta-minus decay.

[2]
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(c)
Figure for question 23
[2]
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