This document contains 2022

AQA AS PHYSICS PAPER 1 2022 BUNDLE

Question Paper + Mark Scheme 2022

Answer all questions in the spaces provided. box

0 1 A sigma-plus (Σ+

) particle and an unidentified particle Y are produced by the strong

interaction between a positive pion (π+) and a proton (p).

This interaction is represented by the equation:

 π+ + p → Σ+ + Y

0 1 . 1 Complete Table 1 to show the baryon number B, charge Q and strangeness S for the

particles in this interaction.

[2 marks]

Table 1

π+ p Σ+ Y

B 0

Q +1 +1 +1

S +1

0 1 . 2 Which particle in Table 1 has the quark structure uus?

Tick () one box.

[1 mark]

π+

p

Σ+

Y

3

*03*

Turn over ►

IB/M/Jun22/7407/1

Do not write

outside the

0 1 box . 3 Deduce which particle, π+ or Y, has the greater charge-to-mass ratio.

Justify your conclusion.

[3 marks]

Turn over for the next question

6

4

*04*

IB/M/Jun22/7407/1

Do not write

outside the

0 2 A box sample of bromine gas contains a mixture of two isotopes. An experiment is done

to find the percentage of each isotope in this sample.

0 2 . 1 In the experiment, the gas is ionised by a beam of electrons.

Explain how the beam of electrons causes a particle of the gas to have a charge

of +1e.

[2 marks]

The gas consists of bromine molecules. Each molecule has two bromine atoms.

The experiment finds that the bromine molecules contain 158, 160 or 162 nucleons.

Figure 1 shows the percentage of these different molecules in the sample