Imagine yourself setting up a simple circuit. What do you do?

Physics Narrative 14-16

To make things memorable and to emphasise the physics, just follow what you do.

Physics Narrative 14-16

A potential difference of 230 volt is quite safe, but this safety is a trade-off for lower efficiency (we explain why it is...

Physics Narrative 14-16

An alternating current is driven first one way and then the other by the alternating potential difference: the polarity of the...

Physics Narrative 14-16

Potential difference, current and resistance are constrained. All three are interlinked, in that changing any one is likely to...

Physics Narrative 14-16

One reason for controlling the flow of charge round an electrical circuit is so that energy can be shifted to the particular...

Physics Narrative 14-16

Resistance impedes current, so adding more resistance results in less current. So, perhaps much as you would expect, adding a...

Physics Narrative 14-16

Adding more routes for the charge to take will result in an increased flow, so more current, as there will be less resistance...

Physics Narrative 14-16

Circuits with only one parallel connection are best analysed by thinking of the two separate loops that make up the circuit...

Physics Narrative 14-16

Domestic circuits are more complex than those studied in the school laboratory. As with alternating current, however, simple...

Physics Narrative 14-16

The physics relied on in the arguments here depends on thinking about the flows resulting from the resistors impeding the flow...

Physics Narrative 14-16

There are only a few quantities in these three element circuits containing either only series or only parallel connections:

Physics Narrative 14-16