AQA A-LEVEL PHYSICS 7408/2 Paper 2 Question Paper + Mark scheme [MERGED] June 2022

AQA

A-LEVEL

PHYSICS

7408/2

Paper 2

Question Paper + Mark scheme [MERGED]

June 2022

*JUN227408201*

IB/M/Jun22/E13 7408/2

For Examiner’s Use

Question Mark

1

2

3

4

5

6

7–31

TOTAL

Time allowed: 2 hours

Materials

For this paper you must have:

• a pencil and a ruler

• a scientific calculator

• a Data and Formulae Booklet

• a protractor.

Instructions

• Use black ink or black ball-point pen.

• Fill in the boxes at the top of this page.

• Answer all questions.

• You must answer the questions in the spaces provided. Do not write

outside the box around each page or on blank pages.

• If you need extra space for your answer(s), use the lined pages at the end of

this book. Write the question number against your answer(s).

• Do all rough work in this book. Cross through any work you do not want

to be marked.

• Show all your working.

Information

• The marks for questions are shown in brackets.

• The maximum mark for this paper is 85.

• You are expected to use a scientific calculator where appropriate.

• A Data and Formulae Booklet is provided as a loose insert.

Please write clearly in block capitals.

Centre number Candidate number

Surname

Forename(s)

Candidate signature

I declare this is my own work.

A-level

PHYSICS

Paper 2

2

*02*

IB/M/Jun22/7408/2

Do not write

outside the

Section A box

Answer all questions in this section.

0 1 Figure 1 shows an electric steam iron.

Figure 1

Water from a reservoir drips onto an electrically-heated metal plate. The water boils

and steam escapes through holes in the metal plate.

The electrical power of the heater inside the iron is 2.1 kW.

Assume that all the energy from the heater is transferred to the metal plate.

0 1 . 1 The metal plate has a mass of 1.2 kg and is initially at a temperature of 20 °C.

The heater is switched on. After a time t the metal plate reaches its working

temperature of 125 °C.

Calculate t.

 specific heat capacity of the metal = 450 J kg−1 K