The SI unit of electric charge is the:
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Practise IGCSE 0625 questions in the style of recent Extended past papers, organised by syllabus subtopic. Each set comes with an examiner-style mark scheme and a downloadable worksheet.
Everything students ask about Cambridge IGCSE 0625 Electrical quantities Topical Past Papers.
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These Electrical quantities Topical Past Paper Questions are written in the style of recent Cambridge IGCSE Physics 0625 Extended papers and grouped by the Electricity and magnetism (P4.2) section of the 2025–2027 syllabus. Use them to revise the exact skills examiners test in this part of the course.
Each question is graded Easy → Medium → Hard, plus an A★ Challenge for top-grade preparation. Tap a question to mark your own answer, then unlock the examiner-style mark scheme with model solutions and examiner tips. A printable Topical Past Papers worksheet is included so you can practise offline.
Define charge (Q = It), current, potential difference (V) and resistance (R = V/I). Apply Ohm's law and identify ohmic and non-ohmic conductors (filament lamp, diode) from I–V graphs. Apply electrical energy E = IVt and power P = IV.
The SI unit of electric charge is the:
A steady current of 0.5 A flows through a torch bulb for 2 minutes.
Convert 2 minutes to seconds.
[1 mark]Calculate the total charge that flows through the bulb.
[1 mark]A 6.0 V battery drives a current of 0.4 A through a fixed resistor. The resistance of the resistor is:
A 12 V supply is connected across a resistor of resistance 4.0 Ω.
Calculate the current in the resistor.
[1 mark]Calculate the electrical power dissipated by the resistor.
[1 mark]Calculate the total electrical energy transferred in 5.0 minutes.
[1 mark]A conductor obeys OHM'S LAW if:
A student investigates a FILAMENT LAMP and a fixed METAL WIRE resistor at room temperature. For each, they plot a graph of current I (vertical axis) against potential difference V (horizontal axis), allowing V to vary from −6 V to +6 V.
Describe the SHAPE of the I–V graph for the FIXED METAL WIRE.
[1 mark]Describe the SHAPE of the I–V graph for the FILAMENT LAMP and EXPLAIN why it has this shape.
[2 marks]An electric heater is rated 230 V, 2.0 kW.
Calculate the operating current of the heater.
[1 mark]Calculate the resistance of the heating element when operating.
[1 mark]Calculate the energy transferred by the heater in 30 minutes. Give your answer in joules.
[2 marks]The I–V graph for an ideal SEMICONDUCTOR DIODE is best described as: