Class practical: a minute current in the base-emitter circuit is used to control a much larger current in the collector...
Demonstration: an approach to Ohm's law in a quick demonstration.
Class practical: this experiment looks at the relationship between current and potential difference (p.d.) for a length of...
Demonstration: solutions may show ohmic or non-ohmic characteristics.
Demonstration: gases conduct electricity, but they have to be ionised first.
Class Practical: adding a multiplier in series with a galvanometer converts it to a voltmeter with a higher range.
Demonstration: this experiment provides an excellent introduction to the concept of potential difference (voltage). Students...
Demonstration: The current flowing in a circuit increases as more lamps are added in parallel with each other.
Demonstration: opening up discussion of the difference between potential difference (PD) and electromotive force (EMF).
Class experiment: a voltmeter, by measuring the voltage across several 1.5 V cells in series, can count the cells.
Demonstration: current can be modelled by the flow of water; potential difference corresponds to water pressure.
Class practical: experimenting with a voltmeter leads to a discussion of the meaning of potential difference or voltage.
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