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AQA A LEVEL PHYSICS 7408/2 PAPER 2 MARK SCHEME JUNE 2022

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AQA A LEVEL PHYSICS 7408/2 PAPER 2 MARK SCHEME JUNE 2022. Combining and making use of Q = Pt and Q = 1 numerical errors are ignored for this mark. Provided the temperature difference is correct then subsequent changes that involve 273 0C can be ignored. (125−20) 2 t = (1.2 × 450) 2100 No ecf for the second mark but correct answer gains both marks Condone use of cwater for cmetal. 2 2 x AO2 mc � equations without the need to make t the subject. 1 t = 27 (s) 2 3.6.2.1 6 S- T- hTehMe aMrkaertkpelatcpelatcoeBtuoy BanudySaenldl ySouerllSytouduyr MStautedryial MARK SCHEME – A-LEVEL PHYSICS – 7408/2 – JUNE 2022 DownloadedDboyw: AnLloVaINdeKd20b2y2:|HmIGirrHykFaLmYEaRa2|@ Want to earn $103 per month? Distribution of this document is illegal Question Answers Additional comments/Guidelines Mark AO 01.2 (The power supplied in time t raises the temperature of m kg of water and converts it to steam) Use of appropriate equation. 1 Correct evaluation of m or P. No ecf. 2 Deduction that claim is false (consistent with their value) supported by their calculated quantity OR Deduction that their calculated quantity is greater / smaller than required 3 The award of MP3 is dependent on the award of MP1 OR MP2. Evidence for MP1 can be seen in MP2 via the correct answers in the exemplars below. Condone error in time / temperature change / POT for MP1. Use of m from the metal is not condoned �� Δ�+�� Pt = mc Δθ + ml OR P = � 1 w t 2 Several methods can be followed including in 1 minute 2100 × 60 = m × 4200 × (100 – 20) + m × 2.3 × 106 m = 0.048 kg min–1 OR in one second 2100 = m × 4200 × (100 – 20) + m × 2.3 × 106 m = 0.00080 kg s–1 OR P = 0.060 × 4200 × (100 − 20) + 0.060 × 2.3 × 106 = 60

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AQA A LEVEL PHYSICS 7408/2
PAPER 2 MARK SCHEME JUNE
2022

,A-LEVEL
PHYSICS
7408/2
Paper 2
Mark scheme
June 2022
Version: 1.0 Final

, MARK SCHEME – A-LEVEL PHYSICS – 7408/2 – JUNE


Mark schemes are prepared by the Lead Assessment Writer and considered, together with
the relevant questions, by a panel of subject teachers. This mark scheme includes any
amendments made at the standardisation events which all associates participate in and is
the scheme which was used by them in this examination. The standardisation process
ensures that the mark scheme covers the students’ responses to questions and that every
associate understands and applies it in the same correct way.
As preparation for standardisation each associate analyses a number of students’ scripts.
Alternative answers not already covered by the mark scheme are discussed and legislated
for. If, after the standardisation process, associates encounter unusual answers which have
not been raised they are required to refer these to the Lead Examiner.

It must be stressed that a mark scheme is a working document, in many cases further
developed and expanded on the basis of students’ reactions to a particular paper.
Assumptions about future mark schemes on the basis of one year’s document should be
avoided; whilst the guiding principles of assessment remain constant, details will change,
depending on the content of a particular examination paper.


Further copies of this mark scheme are available from aqa.org.uk

, MARK SCHEME – A-LEVEL PHYSICS – 7408/2 – JUNE

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