The cards Question What is a filament lamp? Tap to flip Answer A lamp that uses a hot wire to emit light. Question What is a variable resistor? Tap to flip Answer A resistor that can easily be changed to any value in its range. Question What does a line of best fit on a graph show? Tap to flip Answer The underlying trend of a set of results; it can be straight or curved. Question How is the resistance of a filament lamp found from an I–V graph? Tap to flip Answer Using pairs of readings and the equation R = V ÷ I. Question What is an ohmic conductor? Tap to flip Answer A conductor for which the current is directly proportional to the p.d. Question What is a metal ion? Tap to flip Answer A metal atom that has lost one or more outer electrons and become positively charged. Question What is a free electron in a metal? Tap to flip Answer An electron from an atom's outer shell that is free to move from ion to ion through the metal. Question What is a metal made of? Tap to flip Answer A lattice of positively charged ions with negatively charged electrons between them. Question As the p.d. across a filament lamp rises, does its current increase in an ohmic or a non-ohmic way? Tap to flip Answer In a non-ohmic way (the lamp also gets hotter). Question How does the resistance of a filament lamp change as the p.d. across it increases? Tap to flip Answer It increases: the greater the p.d., the greater the resistance. Question As a current flows through a metal, what do the moving electrons do to the ion lattice? Tap to flip Answer They make it vibrate more vigorously. Question How does more vigorous vibration of a metal's ion lattice affect the metal? Tap to flip Answer It makes the metal hotter and raises its resistance. Question Why is the gradient of a filament lamp's I–V graph not simply 1/R? Tap to flip Answer The graph is not a straight line, so y = mx + c does not apply. Question What is a diode used for? Tap to flip Answer To prevent current flowing in one direction. Question What is a semiconductor? Tap to flip Answer A material that has both metallic and non-metallic properties. Question What is the threshold p.d. of a diode? Tap to flip Answer The potential difference at which the diode allows current to flow. Question What does a forward-biased diode do to current? Tap to flip Answer It allows current to flow. Question What does a reverse-biased diode do to current? Tap to flip Answer It prevents current from flowing. Question What do a diode's properties depend on? Tap to flip Answer The direction of the p.d. across it. Question In forward bias, what is a diode's resistance once the p.d. is above the threshold voltage? Tap to flip Answer Very small. Question What is a diode's resistance in reverse bias? Tap to flip Answer Very large, so very little current can flow. Question What is a fuse? Tap to flip Answer A component with a wire that melts if the current is too high. Question What is an ion lattice? Tap to flip Answer The regular, repeating pattern in which metal ions are arranged in a solid metal. Question How does a greater p.d. across a component affect the electric charges in it? Tap to flip Answer It gives a larger push on them. Question How does a greater current through a component affect its heating? Tap to flip Answer The heating effect on it is larger. Question What is a series circuit? Tap to flip Answer An electrical circuit with a single loop. Question What does potential difference measure? Tap to flip Answer The push an electric field gives to charges. Question What is resistance? Tap to flip Answer A property of a material that opposes the flow of current. Question What is a potential divider? Tap to flip Answer A series circuit that divides the p.d. across a power supply into two or more smaller voltages. Question In a series circuit, how do the p.d.s across the components relate to the p.d. across the battery? Tap to flip Answer They add up to the p.d. across the battery. Question How does the current compare through the components of a series circuit? Tap to flip Answer It is the same through every component. Question How does a larger total resistance affect the current in a series circuit? Tap to flip Answer The current is smaller. Question In a series circuit, what is each component's share of the p.d. proportional to? Tap to flip Answer Its resistance. Question How does the resistance of a light-dependent resistor (LDR) change in brighter light? Tap to flip Answer It gets lower. Question How does the resistance of a thermistor change as its temperature rises? Tap to flip Answer It gets lower. Question Give one use of a potential divider circuit containing an LDR or a thermistor. Tap to flip Answer E.g. triggering a switch if it becomes too dark or too cold. Where this deck sits in the curriculum Curriculum National Curriculum for England Stage GCSE (Years 10–11) Course GCSE Physics Unit Circuit components Exam boards AQA, Edexcel, OCR Tiers foundation and higher England's National Curriculum sets what is taught; the units and their order are Oak National Academy's. Flash Feed is not affiliated with Oak or any exam board.
How this deck was checked On 2026-11-02, every card was compared with its source: the lessons of Oak National Academy, a public body funded by England's Department for Education that publishes lessons for the national curriculum. Because the cards come from those lessons, no second source was sought. The comparison was done automatically, not by a teacher, so a card can still be wrong. Flash Feed is not affiliated with any source named here.
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A Physics lesson by Oak National Academy licensed under Open Government Licence (OGL)
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