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Exam (elaborations)

COMBINED SCIENCE: TRILOGY

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0 1 Figure 1 shows the inside of a plug. Figure 1 . The plug is not wired correctly. What should be done to connect the wires in the plug correctly? [1 mark] box . The washing machine is switched on. What is the potential difference between the neutral wire and the earth wire? [1 mark] Potential difference = V . The plug has a fuse. Draw the circuit symbol for a fuse in the space below. [1 mark] Question 1 continues on the next page Turn over ► The washing machine has a metal case. A fault causes the live wire to make an electrical connection with the metal case of the washing machine. box . The earth wire is not connected to the metal case of the washing machine. Explain why it would not be safe for a person to touch the metal case. [2 marks] . The earth wire is now connected to the metal case of the washing machine. Explain why it would now be safe for a person to touch the metal case, even if the live wire touches the metal case. [2 marks] Different radioactive isotopes emit different types of nuclear radiation. A polonium-210 (Po) nucleus emits an alpha particle (α) and turns into a lead (Pb) nucleus. This can be represented by the equation: box . What is the value of A in the equation? Tick () one box. A = 206 A = 208 A = 210 A = 211 . What is the value of Z in the equation? Tick () one box. Z = 80 Z = 82 Z = 85 Z = 86 Question 2 continues on the next page [1 mark] [1 mark] Turn over ► . A strontium-89 nucleus (Sr) emits a beta particle (β) and turns into an yttrium nucleus (Y). This can be represented by the equation: . Gamma radiation is another type of nuclear radiation. What does gamma radiation consist of? Tick () one box. [1 mark] box High energy neutrons Electromagnetic waves Particles with no charge Positively charged ions . Explain the differences between the properties of alpha, beta and gamma radiations. [6 marks] box

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COMBINED SCIENCE: TRILOGY



Please write clearly in block capitals.

Centre Candidate
number number


Surname

Forename(s)

Candidate re
signatu


GCSE
COMBINED SCIENCE: TRILOGY
Higher Tier
H
Physics Paper
1H
Wednesday 20 May 2020 Afternoon Time allowed: 1
hour 15 minutes
Materials For Examiner’s
For this paper you must have: Use
 a ruler Questio Mark
 a scientific calculator n
 the Physics Equations Sheet (enclosed). 1
2
Instructions 3
 Use black ink or black ball-point pen.
4
 Pencil should only be used for drawing.
 Fill in the boxes at the top of this page. 5
 Answer all questions in the spaces provided. 6
 If you need extra space for your answer(s), use the lined pages at the end of
7
this book. Write the question number against your answer(s).
 Do all rough work in this book. Cross through any work you do not TOTAL
want to be marked.
 In all calculations, show clearly how you work out your answer.

Information
 The maximum mark for this paper is 70.
 The marks for questions are shown in brackets.
 You are expected to use a calculator where appropriate.
 You are reminded of the need for good English and clear presentation in your answers.




*jun20 464p1h01*
IB/M/Jun20/E14 8464/P/1H

, 2
Do not write
outside the
0 1 Figure 1 shows the inside of a plug. box


Figure 1




0 1 .1 The plug is not wired correctly.

What should be done to connect the wires in the plug correctly?
[1 mark]




*02
IB/M/Jun20/8464/P/
* 1H

, 3
Do not write
outside the
The correctly wired plug and cable connects a washing machine to the box

mains electricity supply.

0 1
.2 Give the potential difference and frequency of the mains electricity supply
in the UK.
[2 marks]
The potential V
difference is
The frequency is Hz




0 1 .3 The washing machine is switched on.

What is the potential difference between the neutral wire and the
earth wire?
[1 mark]
Potential difference = V




0 1 .4 The plug has a fuse.

Draw the circuit symbol for a fuse in the space
below.
[1 mark]




Question 1 continues on the next page




*03
IB/M/Jun20/8464/P/
* 1H

, 4
Do not write
outside the
Turn over ►




*03
IB/M/Jun20/8464/P/
* 1H

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Written in
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