ZIMSEC O-Level Combined Science
7.3.6.2Current, voltage and circuits
Current, voltage and circuits in ZIMSEC O-Level Combined Science: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic64 practice questions5 lessons
Overview
Forms 1 to 3.
Learning objectives
What the syllabus expects you to be able to do.
- 7.3.6.2.1Define current and voltage, state their units, and measure them.
- 7.3.6.2.2Distinguish between conductors and insulators.
- 7.3.6.2.3Draw, label and interpret circuit diagrams using standard symbols, and construct simple circuits.
- 7.3.6.2.4Calculate the total resistance of resistors in series and in parallel.
Lessons
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Cells, batteries and other sources of e.m.f.
20 min
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Circuit diagrams and components
25 min
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E.m.f. and potential difference
25 min
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Electric current
25 min
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Series and parallel circuits
30 min
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Sample question
A sample question on this topic. Answer it, check it, then read the worked answer.
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