‹ Science Essentials
Electric circuits
Circuit symbols, charge and current, V = IR, I-V graphs, series and parallel circuits, and sensing circuits with LDRs and thermistors.
Start: Circuit symbols, charge and current About 11 min
Lessons
Practice and tests
By the end you can
Draw and read circuit diagrams, placing ammeters and voltmeters correctly Calculate charge, current, p.d. and resistance with Q = It and V = IR, in mA, kΩ and minutes Recognise and use the I-V graphs of a resistor, a filament lamp and a diode Apply the series and parallel rules for current, p.d. and resistance Predict how sensing circuits with LDRs and thermistors respond Plan and analyse the I-V and resistance required practicals Helps with: GCSE (AQA, Edexcel, OCR)
Next unit: Mains electricity, the National Grid and static Previous unit: Energy stores, transfers and efficiency
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