Equation linking State the correct SI units for each Why does increasing the potential quantity (potential difference, potential difference in a circuit difference, current current and resistance). also increase the current? and resistance How does the type of metal used should be known. What is by resistance? potential difference, V, in for a wire affect its resistance? How to find the volts, V Find the resistance of some Why do expensive leads resistance of electrical components using current, I, in amperes, A electrical have gold plating on them? current and potential components by resistance, R, in ohms, Ω difference readings. What factors affect the resistance experiment. Explain the design and use of a given length of wire? Required practical: of a circuit to measure the Draw a circuit that can be used to resistance of a component Use circuit diagrams to set up find the resistance of an electrical by measuring the current and check appropriate circuits component using a voltmeter and through, and potential to investigate the factors an ammeter. difference across, the affecting the resistance of component. electrical circuits. This should include: Students should set up and the length of a wire at • use a circuit to investigate a constant temperature factor/the factors that affect the resistance of an electrical combinations of resistors in • component(s). series and parallel (10.2.15). Explain how the circuit for determining the resistance will give you the value of resistance from a simple
Equation linking potential difference, current and resistance should be known. How to find the resistance of electrical components by experiment. potential difference, V, in volts, V current, I, in amperes, A resistance, R, in ohms, Ω Explain the design and use of a circuit to measure the resistance of a component by measuring the current through, and potential difference across, the component. Students should set up and use a circuit to investigate a factor/the factors that affect the resistance of an electrical component(s). State the correct SI units for each quantity (potential difference, current and resistance). How does the type of metal used for a wire affect its resistance? Why do expensive leads have gold plating on them? What factors affect the resistance of a given length of wire? Draw a circuit that can be used to find the resistance of an electrical component using a voltmeter and an ammeter. Why does increasing the potential difference in a circuit also increase the current? What is by resistance? Find the resistance of some electrical components using current and potential difference readings. Required practical: Use circuit diagrams to set up and check appropriate circuits to investigate the factors affecting the resistance of electrical circuits. This should include: • the length of a wire at constant temperature • combinations of resistors in series and parallel (10.2.15). Explain how the circuit for determining the resistance will give you the value of resistance from a simple