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Static electricity

Some insulating materials become electrically charged when rubbed together.
Same Charges Repel
Opposite Charges Attract

Conductors cannot be electrically charged as they lose the charge to Earth
When materials are rubbed against each other:
Negatively charged particles (electrons) move from one material to another.
The material that loses…

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Circuits

Electrical circuits can be represented by circuit diagrams and the different components are shown by
using standard symbols. Components can be connected in series, or in parallel. The characteristics of
the current and potential difference (voltage) are different in series and parallel circuits.




Only complete circuits work and if…

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Resistance and resistors

Resistance is measured in ohms or and can be calculated from the potential difference across a
component and the current flowing through it.
Resistance can be measure with this equation:
Potential Difference (V) = Current (A) x Resistance ()
Current = P.D / Resistance
Resistance = P.D…

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