2025 AQA AS PHYSICS Paper 1 Question Paper & Mark Scheme (Merged) Wednesday 14 May 2025 [VERIFIED]

2025 AQA AS PHYSICS Paper 1 Question Paper & Mark Scheme (Merged) Wednesday 14 May 2025
[VERIFIED]

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Answer all questions in the spaces provided. box


0 1 Hydrogen has three naturally occurring isotopes. One of these isotopes is
hydrogen-3 3H .
1

0 1 . 1 Calculate the specific charge of a nucleus of hydrogen-3.
[2 marks]




specific charge = ________________________ C kg−1


0 1 . 2 The specific charge of the hydrogen-3 nucleus is less than the specific charges of the
nuclei of the other two isotopes.

Suggest why.
[2 marks]




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Kaons (K) and pions (π) are produced when a beam of antiprotons is incident on a box
sample of hydrogen gas.

One reaction that occurs is

p p K π K0


0 1 . 3 Deduce, with reference to appropriate conservation laws, the quark structure of the
K0 produced in this reaction.
[3 marks]




quark structure =


0 1 . 4 One possible decay of a π+ particle is

π+ A+B

where A is a charged lepton.

Suggest, with reference to appropriate conservation laws, the name of A and the name
of B.
[2 marks]




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