Circuit components and energy transfer — Edexcel Combined Science 1SC0 | GradeGen
Edexcel GCSE Combined Science · 1SC0
Circuit components and energy transfer
What you need to know
Calculate discrete currents, potential differences, and resistances within series circuits.
Evaluate the design and physical construction of series circuits for the purposes of component testing and measurement.
Construct practical electrical circuits to experimentally investigate the relationship between potential difference, current, and resistance across components like resistors and filament lamps.
Explain the variation of current with potential difference across filament lamps, diodes, and fixed resistors, relating these variations to changes in resistance.
Describe the non-linear relationship between the resistance of a light-dependent resistor (LDR) and ambient light intensity.
Describe the relationship between the resistance of a negative temperature coefficient thermistor and environmental temperature changes.
Explain how specific circuit designs can be utilized to systematically explore resistance variations in components such as filament lamps, diodes, thermistors, and LDRs.
Understand that an electric current flowing through a resistor invariably results in a heating effect due to energy transfer.
Explain the dissipation of electrical energy as thermal energy into the surroundings when current performs work against electrical resistance.
Describe the microscopic mechanism of resistance and heating as a result of physical collisions between flowing electrons and stationary lattice ions.
Explain the methods used to minimize unwanted energy transfer in circuits, primarily through the utilization of low resistance wires.
