ZIMSEC O-Level Physics
11.3Current electricity
Current electricity in ZIMSEC O-Level Physics: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic54 practice questions4 lessons
Overview
Form 4.
Learning objectives
What the syllabus expects you to be able to do.
- 11.3.1Explain the flow of current in a circuit and use I = Q/t.
- 11.3.2Measure current and potential difference with ammeters and voltmeters.
- 11.3.3Define potential difference and use the fact that the p.d.s in a series circuit add up to the total.
- 11.3.4State and apply Ohm's law and state its limitations.
- 11.3.5Describe an experiment to find resistance with a voltmeter and an ammeter.
- 11.3.6Sketch and interpret V-I graphs for ohmic and non-ohmic conductors.
- 11.3.7Use the relationship between resistance, length and cross-sectional area, R = ρl/A.
Lessons
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E.m.f. and potential difference
25 min
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Electric current
25 min
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Resistance and Ohm's law
32 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.
Turn Current electricity into a strength.
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