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P12 syllabus statements

This document outlines the key concepts and formulas students should understand regarding electricity and circuits. It includes definitions of terms like current, potential difference, electromotive force and resistance. It also covers how to measure these values using instruments like ammeters and voltmeters. The document outlines the relationships between resistance, length and cross-sectional area of a wire. It also provides the equations for electrical power and energy. Finally, it identifies electrical hazards and safety devices like circuit breakers and fuses.

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04/01/16 P12 ElectricityP12 Electricity Syllabus statementsSyllabus statements
12.112.1 1. Demonstrate understanding of current, potential difference, e.m.f. and resistance, and use with their appropriate units. 2. State that charge is measured in coulombs (C). 3. Use and describe the use of an ammeter and a voltmeter.
12.2 Electric charge12.2 Electric charge 1. Describe and interpret simple experiments to show the production and detection of electrostatic charges. 2. State that there are positive and negative charges. 3. Describe an electric field as a region in which an electric charge experiences a force.
12.2 Electric charge12.2 Electric charge 4. State that unlike charges attract and that like charges repel. 5. Distinguish between electrical conductors and insulators and give typical examples.
12.3 Current, electromotive12.3 Current, electromotive force & potential differenceforce & potential difference 1. State that current is related to the flow of charge. 2. State that the current in metals is due to a flow of electrons. 3. Demonstrate understanding that a current is a rate of flow of charge and recall and use the equation I = Q / t.
12.3 Current, electromotive12.3 Current, electromotive force & potential differenceforce & potential difference 4. Use the term potential difference (p.d.) to describe what drives the current between two points in a circuit. 5. Distinguish between the direction of flow of electrons and conventional current. 6. Demonstrate understanding that e.m.f. is defined in terms of energy supplied by a source in driving charge round a complete circuit.
12.4 Resistance12.4 Resistance 1. State that resistance = p.d. / current and understand qualitatively how changes in p.d. or resistance affect current. 2. Recall and use the equation R = V / I 3. Describe an experiment to determine resistance using a voltmeter and an ammeter.
12.4 Resistance12.4 Resistance 4. Recall and use quantitatively the proportionality between resistance and length, and the inverse proportionality between resistance and cross- sectional area of a wire. 5. Relate (without calculation) the resistance of a wire to its length and to its diameter.
12.5 Electrical energy12.5 Electrical energy 1. Recall and use the equations: P = I V and E = I V t
12.6 Dangers of electricity12.6 Dangers of electricity 1. Identify electrical hazards including: • damaged insulation • overheating of cables • damp conditions. 2. Demonstrate understanding of the use of circuit-breakers. 3. Demonstrate understanding of the use of fuses.