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GCSE Design and Technology · key term
The opposition to electric current, measured in ohms, Ω.
Used by Edexcel and Eduqas
Specification 1.6.1, 1.6.2, 5.2.1, 5.2.5, 5.5.2 · Paper 1
How strongly a component opposes the flow of electric current, measured in ohms ().
Revise: SensorsBoth work by changing their resistance.
State the direction of the resistance change: brighter light lowers an LDR’s resistance; rising temperature lowers an NTC thermistor’s resistance.
For an application, link the condition detected to the resistance change and then to the product’s response.
For an LDR or an NTC thermistor, describe resistance decreasing—not the sensor itself switching an output on.
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A measure of how strongly a component opposes electric current, measured in ohms ().
A measure of how strongly a component opposes electric current. Its symbol is and its unit is the ohm (Ω).
Component 1
Opposition to electric current, measured in ohms (Ω).
Revise: Electronic Systems, Inputs and OutputsResistance is opposition to current, measured in ohms (Ω).
