Class practical: a minute current in the base-emitter circuit is used to control a much larger current in the collector...
Class praticals: determining resistance from measurements of potential difference (p.d.) and current.
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.
Class practical: investigating the changing resistance of a wire as it heats up.
Demonstration: gases conduct electricity, but they have to be ionised first.
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