The Dependent Variable is what we are testing and will be measured in the experiment. The Control Variables are what we keep the same during the experiment to make sure it’s a fair test.

It’s an electromagnet pendulum analog circuit. Whether you’re building it, or just studying the schematics, this is a fun way to brush up on the non-digital side of the craft. The pendulum is ...

A second experiment can be carried out to investigate ... Record in a table and compare results. Iron and steel make strong electromagnets. The current increases. The number of turns in the ...

Horseshoe-shaped electromagnet used by James Joule, c.1840. This electromagnet was used by the scientist James Joule for experiments about energy. Joule was a Salford resident and the son of a brewer.