TELEPHONE COMMUNICATION

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Publié par

  • revision
  • exposé
TELEPHONE COMMUNICATION SKILLS & ETIQUETTE
  • telephone communications
  • face conversation
  • phone at work
  • trouble with the channel
  • data transmission over wires from computer to computer
  • effective telephone communication
  • communication model
  • telephone
  • business
  • process
Publié le : lundi 26 mars 2012
Lecture(s) : 65
Source : wjec.co.uk
Nombre de pages : 172
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GCSE in PHYSICS Specimen Assessment Materials 1






For teaching from 2011






GCSE in PHYSICS






SPECIMEN ASSESSMENT MATERIALS
GCSE in PHYSICS Specimen Assessment Materials 3

Contents








Page

Unit 1

Question Paper (Foundation Tier) 5

Question Paper (Higher Tier) 23

Mark Schemes 41

Assessment Grids 55

Unit 2

Question Paper (Foundation Tier) 59

Question Paper (Higher Tier) 75

Mark Schemes 89

Assessment Grids 101

Unit 3

Question Paper (Foundation Tier) 105
per (Higher Tier) 123

Mark Schemes 137

Assessment Grids 151

Controlled Assessment 155
GCSE in PHYSICS Specimen Assessment Materials 5

Candidate Name Centre Number Candidate Number
0



GCSE

PHYSICS

FOUNDATION TIER (Grades G-C)

PHYSICS 1: Energy, radiation and the Universe

SPECIMEN PAPER

(1 hour)
















INSTRUCTIONS TO CANDIDATES

Write your name, centre number and candidate number in the spaces at the top of this
page.

Answer all questions.

Write your answers in the spaces provided in this booklet.

INFORMATION FOR CANDIDATES

The number of marks is given in brackets at the end of each question or part-question.

You are reminded that assessment will take into account the quality of written
communication used in your answer to question 10(c).
GCSE in PHYSICS Specimen Assessment Materials 6
Equations and Units

P = IV power = current × voltage
energy transfer = power × time E = Pt
units used (kWh) = power (kW) × time (h)

cost = units used × cost per unit
useful energy [or power] transfer
% efficiency = ×100
total energy [or power] input
mass mdensity = ρ =
volume V
wave speed = wavelength × frequency c = λf
distance
speed =
time
change in velocity Δv
acceleration [or deceleration] = a =
time t
vua=+ t where u = initial velocity
1 v = final velocity x = (u + v)
2
a = acceleration

t = time
x = displacement
voltage Vresistance = R =
current I
momentum = mass × velocity p = mv
resultant force = mass × acceleration F = ma
change in momentum Δp
force = F =
time t
work = force × distance W = Fd
primary coil voltage primary coil turns V N1 1= =
secondary coil voltage secondary coil turns V N2 2
force F
pressure = p =
area A
GCSE in PHYSICS Specimen Assessment Materials 7
Units
1 kWh = 3.6 MJ
T / K = θ / °C + 273

SI multipliers

Prefix Multiplier Prefix Multiplier
3 −12 p k 1010
−9 6 n 10 M 10
9 −6 G 10μ 10
12 −3 m T 1010
GCSE in PHYSICS Specimen Assessment Materials 8
Answer all questions

1. (a) List A gives three energy sources used to generate electricity.
List B gives environmental problems that may be caused by using different energy
sources.

Draw a line from each energy source in list A to an environmental problem it might
cause in list B. Draw 3 lines only. [3]


List B List A

Produces noise

Nuclear

Produces large amounts of
polluting gases
Tides

Requires large amounts of
water for cooling purposes
Wind farm

Affects river estuaries and
wildlife using the river


(b) The energy flow diagram for a coal-fired power station is shown below.

8% lost as heat in
the moving parts in 10% lost as heat in
the power station waste gases

100% input Electrical

energy to the from burning
National Grid coal

50% lost as heat in the
water used for cooling

(i) Calculate the percentage of electrical energy fed into the National Grid.







.....................%
[1]

(ii) Coal-fired power stations produce more carbon dioxide than other power
stations. Give a reason why many people want to reduce the amount of
carbon dioxide pollution. [1]

............................................................................................................................
....................................................................................................................
9
GCSE in PHYSICS Specimen Assessment Materials 9
2. (a) Background radiation is all around us.

• Some rocks on earth are radioactive. • Particles shower down upon us from space.
• Nuclear power stations add a small amount to nature's radioactivity.

Explain, giving a clear reason for your answer, which of the following statements
below contains the most truth. [2]

(i) Background radiation is completely harmless.

(ii) Background radiation can cause harm but very few people are affected by it.

(iii) adiation will kill us.

............................................................................................................................
....................................................................................................................
....................................................................................................................

............................................................................................................................

(b) The table shows readings of background radiation, taken using a Geiger counter. The
readings are all taken in the same place.

Counts in one
27 20 28 18 15
minute

Why do you think the numbers are different?

Put a tick ( ) in the box next to the statement which best explains why the numbers
are different. [1]

Experimental error

Different numbers of radioactive particles

are being produced each minute
The readings were taken at different times

of day.
GCSE in PHYSICS Specimen Assessment Materials 10
3. (a) Electrical appliances often carry a 'rating plate' (as shown below) which gives
information about the appliance.

Model No. A7620
Serial No. 1277993
230 V ~ 50 Hz
2 kW



Use the information on the rating plate to complete the sentences that follow.

This appliance should be connected to a mains supply voltage of ……………
with a frequency of ............................. The appliance transfers ........................
joules of energy every second. [3]

(b) The table gives information from the rating plate for several domestic appliances,
together with the time for which they are switched on in 1 week.


Appliance Power Time switched on
Vacuum cleaner 1.5 kW 1 hour
Toaster 1.2 kW 1 hour
Kettle 3.0 kW4 hours
TV 0.5 kW 30hours
Nightlight 0.005 kW70hours


Identify the appliance which uses the most energy in the week and state why. [2]

…………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………

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