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National 5 Physics Energy and Electricity unit (from SWG June 2011) Suggested amendments D Noble 17 June 2011
content
Outcomes
Suggested Experiences or Contexts
Conservation Learners have investigated energy transformations of a
of energy.
variety of types including electrical into heat energy.
Investigate the transformation of energy.
Investigate the temperature rise of different materials
when supplied with identical amounts of heat energy.
Specific heat
capacity
Storage radiator
Ceramic/metal plate hair straighteners
Ice on ceramic/metal tiles
Slate/laminate flooring
Thermochromic materials
Learners have carried out practical investigations into the
heat energy stored in different materials of the same mass
when heated to the same temperature.
Learners can distinguish between heat as a form of energy
and temperature as the "hotness" of a body.
Heat loss
Learners can carry out calculations involving the
appropriate relationships between the heat energy, specific
heat capacity, mass and the temperature rise of materials.
Apply the relationship E = CmT
Learners have carried out an investigation which measures
heat loss.
Joule’s experiment
Low voltage filament lamp in water
Smart meters for domestic appliances
Learners can use the principle of conservation of energy to
carry out calculations on energy transformations which
involve temperature change.
Energy and Electricity N5 SWG
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Energy and Electricity N5 SWG
Outcomes
Suggested Experiences or Contexts
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Latent heat
Learners have carried out practical investigations to show
that a change of state does not involve a temperature
change and that energy is gained or lost.
Do experiments to investigate the melting point of a solid
e.g. stearic acid. Draw cooling curves to compare with
water.
Learners have researched common applications of latent
heat with reference to
 The change of state
 The material which changes state
 Whether heat is gained or lost
Refrigerators,
Sweating
Heat packs & cool packs
Wind chill
Ground source heat pumps
Learners can carry out calculations using appropriate
relationships involving energy, specific latent heat and
mass.
Apply the relationship E=mL
Kinetic
Model
Learners have researched the kinetic model to explain
how gas pressure is produced.
Gas Laws
Learners have carried out practical investigations into the
relationships between the pressure, temperature and
volume of a fixed mass of gas at constant temperature.
Computer simulations to illustrate how particles produce
gas pressure.
Mechanical models.
Boyle’ Law
Pressure Law
Charles law
Absolute
Learners have used graphical methods to determine
temperature absolute zero of temperature
Learners can describe the relationship between Celsius
and Kelvin temperature.
Learners can calculate pressure, volume and temperature
for a fixed mass of gas using appropriate relationships.
Energy and Electricity N5 SWG
Superconductors
Deep space temperatures
Weather balloons
Tyre pressures
Scuba diving
Apply the relationships PV= const, V/T = const, P/T = const
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Charge
Outcomes
Learners have carried out practical investigation to
demonstrate that there are two types of charge.
Learners can:
 describe the attraction or repulsion of charged objects.
 describe current as a movement of charge around a
circuit
 carry out calculations involving appropriate
relationships between charge, current and time
Suggested experiences or contexts
Experiments with rods/spheres
Van de Graff generator
Applications of static: paint, anti static wipes, aircraft
fuelling, lightning.
Apply the relationship Q=It
Potential
difference
Learners have researched the work an influential scientist
and the development of our understanding of electricity.
Franklin, Faraday, Volta, Ohm, Ampere
Galvani, Van der Graaf, Tesla, Millikan
Learners have researched the relationship between potential
difference and energy.
Teltron tubes
Learners can:
 state the definition for potential difference related to
both supply and energy conversion in a circuit.
 state that the voltage of the supply is a measure of the
energy given to the charges in a circuit
 carry out calculations involving appropriate
relationships between energy charge and voltage
Energy and Electricity N5 SWG
Internet/computer
Particle accelerators : CERN
Spark plugs
Apply the relationship V =E/Q
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Circuits
Outcomes
Learners have researched standard electrical symbols.
Suggested experiences or contexts
IET data sheets
Learners have set a variety of series circuits with up to 5 components and
a voltmeter to measure the potential difference of any one component.
Internet/computer
Learners can draw and identify symbols for the following components:
 Cell
 Battery
 Bulb
 Switch resistor
 Variable resistor
 Ammeter
 Voltmeter
 LED
 Ohmmeter
 Motor
Learners can correctly position ammeters and voltmeters in a circuit
Learners have carried out practical investigations measuring current
through components in series circuits to verify conservation of charge.
Learners have carried out practical investigations to measure potential
differences across components in series circuits to verify conservation of
energy.
Learners can:
 describe the relationship of the current at all points in a series
circuit.
 describe the relationship between potential differences across
components in series compared to the potential difference of the
supply .
Energy and Electricity N5 SWG
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Ohm’s
Law
Outcomes
Learners have carried out practical investigations to
determine the relationship between potential difference,
current and resistance in a simple circuit.
Learners can:
 conclude that V/I for a resistor remains constant
for different currents and is the resistance of the
resistor.
 carry out calculations involving the appropriate
relationships between potential difference, current
and resistance
Suggested experiences or contexts
Apply the relationship V=IR
Learners have carried out practical investigations with
non-ohmic conductors.
V/I in a car lamp
Learners have carried out research into the uses of
variable resistors.
Game controllers
Remote controls for toy cars, train sets…..…etc
Energy and Electricity N5 SWG
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Parallel
Circuits
Outcomes
Learners have set up parallel circuits with up to three branches.
Suggested experiences or contexts
Car wiring
Domestic wiring
Learners have carried out practical investigations to measure
currents through components in parallel circuits to verify
conservation of charge.
Learners can:
 describe the relationship of currents in parallel branches
compared to the current drawn from the supply.
 describe the relationship of the potential difference across
components in parallel and the supply.
Is= const
Ip= I1 + I2
Learners have carried out practical investigations into the total
resistance of resistors in series and parallel.
Learners have carried out investigations into voltage dividers
Voltage divider circuits
Vp = 1/R1 +1/R2 + ...
Learners can carry out calculations to find the total resistance of
combinations of resistors in series and parallel.
Power
Learner have carried out practical investigations to measure the
power ratings of lamps or heaters
Learners can calculate electrical power using appropriate
relationships
Energy and Electricity N5 SWG
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Low power appliances
Loudspeaker ratings
Light bulbs
Heaters and kettles
Hybrid cars
Apply the relationships P=VI, P=V2/R, P=I2R
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Content
Magnets
(possibly
move to
nat 4?)
Outcomes
Learners have carried out an investigation into the properties of
magnets.
Suggested experiences or contexts
Experiments with magnets and iron filings.
Learners can:
 describe the behaviour of magnets in terms of poles
 draw magnetic field patterns.
Learners should have carried out research into the practical uses
of electromagnets.
Learners should have carried out an investigation into the
strength of electromagnets.
Generation Learners have researched the generation of potential difference.
of
electricity
Learners can:
 describe the following factors on the magnitude of an
induced potential difference.
 effect of the relative speed of the magnet and the coil,
 the number of turns in the coil
 the strength of the magnet
Learners should have carried out a practical investigation into the
difference between alternating and direct current.
Learners can distinguish between sources of AC and DC
Simple experiments on the generation of
potential difference.
Research into commercial power stations.
Simple experiments with components and the
difference in their characteristics with AC and
DC, oscilloscope patterns.
Research into mains values in different
countries.
Energy and Electricity N5 SWG
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Outcomes
Transformers Learners should have carried out a practical investigation with
transformers to measure potential difference in the primary and
secondary coils.
Learners can:
 explain why transformers only work in a.c.
 Use the relationship between turns ratio and voltage
ratio for an ideal transformer
Suggested experiences or contexts
Difference between ideal and real transformers.
Apply the relationship np/ns = Vp/Vs
Learners have conducted experiments to measure the power
loss in a transformer.
Model power lines.
Learners have researched the use of transformers in the
transmission of electricity.
Mechanical
Energy
Learners can:
 explain why transformers are used to transmit electricity
at high potential differences.
 use appropriate relationships to calculate power loss in
transmission lines.
Learners have measured the potential and kinetic energy of
objects and compared the energy during vertical movement
Learners can carry our calculations with potential and kinetic
energy in situations involving conservation of energy.
Energy and Electricity N5 SWG
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Theme park rides
Skateboarders
Free fall objects
Apply the relationships E =mgh, E=1/2 mv2
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