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| 2.1 | RESISTANCE |
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| > | Understand the physical properties of resistance and its relationship to voltage and current. This will include: |
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| C | 2.2 | Explains the difference between a conductor and an insulator by considring atomic valency. |
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| 2.3 | States the relationship between the resistance of a conductor and its length, cross-sectional area, and resistivity, and solves associated problems. |
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| R | 2.4 | States that resistance varies with temperature. |
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| R | 2.5 | Investigates the different types of commercially available resistors and their colour coding. |
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| A | 2.6 | Performs calculations relating to current, potential difference and resistance for simple series and parallel resistive circuits. |
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| R | 2.7 | Uses standard symbols for electrical components when drawing circuit diagrams. |
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| R | 2.8 | States that for a current to flow between two points in a circuit a potential difference is required between them. |
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| A | 2.9 | Measures current using an ammeter, potential difference using a voltmeter, and draws a graph of the relationship between potential difference and current, for: |
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| - | a single resistor |
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| - | a non-linear component such as a lamp |
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| C | 2.10 | Defines and describes resistance. |
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| R | 2.11 | States Ohm's Law and solves simple problems. |
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| C | 2.12 | Recognises, given a series circuit diagram, that: |
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| - | the current is the same in all parts of the circuit |
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| - | the sum of the voltages is equal to the total applied voltage |
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| C | 2.13 | Derives the equation for resistors connected in series, and solves simple problems including the use of Ohm's Law. |
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| R | 2.14 | Recognises, given a parallel circuit diagram, that: |
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| - | the sum of the currents in the resistors is equal to the current flowing into the network |
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| - | the Potential difference is the same across the resistors |
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| C | 2.15 | Derives the equation for resistors connected in parallel. |
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| 2.16 | Calculate power in electrical circuits by the use of: |
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| - | P = IV = I2R = V2R |
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| 2.1.1 | CAPACITANCE |
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| > | Understand the physical properties of capacitance and its relationship to voltage current and charge. This will include: |
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| R | 2.1.2 | States that charged bodies attract or repel each other. |
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| 2.1.3 | Expresses field strength as force per unit charge. |
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| C | 2.1.4 | Defines potential and potential difference. |
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| 2.1.5 | Expresses field strength as potential gradient. |
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| R | 2.1.6 | States that charge Q on an object is proportional to its potential. |
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| C | 2.1.7 | Defines capacitance as Q/V. |
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| R | 2.1.8 | States the unit for capacitance as the Farad. |
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| 2.1.9 | States how the area of the plates of a parallel-plate capacitor, the distance between the plates and the medium (dielectric) between the plates relates to the value of capacitance. |
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| 2.1.10 | Describes the field and its strength between parallel plates (V/d). |
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| C | 2.1.11 | Defines dielectric constant. |
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| 2.1.12 | Calculates the equivalent capacitance of capacitors connected in series, and connected in parallel. |
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| A | 2.1.13 | Completes calculations involving series-parallel capacitors. |
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| R | 2.1.14 | Relates dielectric strength to capacitor working voltage. |
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| 2.1.15 | Describes how a capacitor stores energy. |
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| C | 2.1.16 | Defines the energy stored by a capacitor (QV/2= Cv2/2). |
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| A | 2.1.17 | Completes calculations for energy stored in a capacitor. |
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| R | 2.1.18 | Lists and distinguishes between different types of practical capacitor. |
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| A | 2.1.19 | Completes calculations for simple series CR circuit. In terms of voltage rise and decay versus time constant. |
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| 2.2.1 | MAGNETISM |
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| > | Understand the physical properties of magnetism and magnetic materials. This will include: |
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| R | 2.2.2 | Defines the terms: flux, flux density, m.m.f. and magnetising force. |
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| 2.2.3 | States the relationship between flux density B and field strength H. |
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| 2.2.4 | Defines permeability. |
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| 2.2.5 | Describes the effects of ferromagnetic materials on flux density. |
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| 2.2.6 | Defines relative permeability. |
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| 2.2.7 | Draws comparative magnetising curves for typical ferromagnetic materials, e.g. cast iron, St alloy, a ferrite. |
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| 2.2.8 | States range of values of relative permeabilities for common ferromagnetic materials. |
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| 2.2.9 | Defines reluctance(s). |
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| 2.2.10 | States the units for a magnetic field (B, H, m.m.f., , and S). |
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| C | 2.3.11 | Solves series magnetic circuits involving not more than a single change of dimension, material or air gap, using data from magnetisation curves. |
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| R | 2.2.12 | Lists the reasons for magnetic screening. |
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| 2.2.13 | Defines hysteresis from given hysteresis loops. |
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| 2.2.14 | Outlines the losses associated with hysteresis. |
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| 2.2.15 | Identifies remanence, coercive force and saturation from hysteresis loop. |
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| 2.3.1 | INDUCTANCE |
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| > | Understand the physical properties of inductance and its relationship to voltage and current. This will include: |
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| R | 2.3.2 | States that a current-carrying conductor produces a magnetic field and gives an example of an application of this effect, eg. an electromagnet. |
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| C | 2.3.3 | Describes the type of magnetic field pattern produced by (a) a bar magnet, (b) a solenoid. |
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| R | 2.3.4 | States that a current-carrying conductor experiences a force when in a magnetic field. |
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| C | 2.3.5 | Describes electromagnetic induction with reference to the movement of a magnet in a coil connected to a DC source. |
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| R | 2.3.6 | State that inductance can be defined as the storage of energy in a magnetic field. |
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| C | 2.3.7 | Describe an inductor in terms of: number of turns; permeability of the core; area of the core; length of the core. |
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| A | 2.3.8 | Draws a graph and calculates the current in an inductor in series with a resistor for various values of time constant. |
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| 2.3.9 | Calculates the total value of inductors in parallel and series. |
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| R | 2.3.10 | Lists and distinguishes between the various types of commercially available inductors.
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