P5.2.4 recall that the resistance of connecting P3.2.4 describe an experiment to wires is so small that it can usually be investigate the resistance of a wire ignored and be able to draw the circuit diagram of the circuit used P5.2.5 understand that when electric charge P3.4.1 describe the energy transfers that flows through a component (or device), take place when a system is work is done by the power supply, and changed by work done when a energy is transferred from it to the current flows through a component component and/or its surroundings P5.2.6 recall that power (in watts, W) is a P3.4.2 explain, with reference to measure of the rate at which an examples, how the power transfer electrical power supply transfers energy in any circuit device is related to to an appliance or device and/or its the energy transferred from the surroundings power supply to the device and its surroundings over a given time: power (W) = energy (J) ÷ time (s) P5.2.7 use the equation: power = voltage × P3.4.4 recall and apply the relationships current (watts, W) (volts, V) (amperes, between power transferred in any A) circuit device, the potential difference across it, the current through it, and its resistance: power (W) = potential difference (V) x current (A) power (W) = (current (A))2 x resistance (Ω) P5.2.8 recall that resistors get hotter when NA NA there is an electric current flowing through them, and understand that this heating effect is caused by collisions between the moving charges and ions in the wire P5.2.9 recall that this heating effect makes a P3.2.5 recall that for some components lamp filament hot enough to glow the value of R remains constant (fixed resistors) but that in others it can change as the current changes (e.g. heating elements, lamp filaments)
P5.2.4 recall that the resistance of connecting wires is so small that it can usually be ignored P3.2.4 describe an experiment to investigate the resistance of a wire and be able to draw the circuit diagram of the circuit used P5.2.5 understand that when electric charge flows through a component (or device), work is done by the power supply, and energy is transferred from it to the component and/or its surroundings P3.4.1 describe the energy transfers that take place when a system is changed by work done when a current flows through a component P5.2.6 recall that power (in watts, W) is a measure of the rate at which an electrical power supply transfers energy to an appliance or device and/or its surroundings P3.4.2 explain, with reference to examples, how the power transfer in any circuit device is related to the energy transferred from the power supply to the device and its surroundings over a given time: power (W) = energy (J) ÷ time (s) P5.2.7 use the equation: power = voltage × current (watts, W) (volts, V) (amperes, A) P3.4.4 recall and apply the relationships between power transferred in any circuit device, the potential difference across it, the current through it, and its resistance: power (W) = potential difference (V) x current (A) power (W) = (current (A))2 x resistance (Ω) P5.2.8 recall that resistors get hotter when there is an electric current flowing through them, and understand that this heating effect is caused by collisions between the moving charges and ions in the wire NA NA P5.2.9 recall that this heating effect makes a lamp filament hot enough to glow P3.2.5 recall that for some components the value of R remains constant (fixed resistors) but that in others it can change as the current changes (e.g. heating elements, lamp filaments)
Physics%20final.docx