Electricity and Magnetism

Class practical: a minute current in the base-emitter circuit is used to control a much larger current in the collector...

Practical Activity 14-16

Demonstration: an approach to Ohm's law in a quick demonstration.

Practical Activity 14-16

Class practical: this experiment looks at the relationship between current and potential difference (p.d.) for a length of...

Practical Activity 14-16

Demonstration: solutions may show ohmic or non-ohmic characteristics.

Practical Activity 14-16

Demonstration: gases conduct electricity, but they have to be ionised first.

Practical Activity 14-16

Class Practical: adding a multiplier in series with a galvanometer converts it to a voltmeter with a higher range.

Practical Activity 14-16

Demonstration: this experiment provides an excellent introduction to the concept of potential difference (voltage). Students...

Practical Activity 14-16

Demonstration: The current flowing in a circuit increases as more lamps are added in parallel with each other.

Practical Activity 14-16

Demonstration: opening up discussion of the difference between potential difference (PD) and electromotive force (EMF).

Practical Activity 14-16

Class experiment: a voltmeter, by measuring the voltage across several 1.5 V cells in series, can count the cells.

Practical Activity 14-16

Demonstration: current can be modelled by the flow of water; potential difference corresponds to water pressure.

Practical Activity 14-16

Class practical: experimenting with a voltmeter leads to a discussion of the meaning of potential difference or voltage.

Practical Activity 14-16