Electricity

Electricity The flow of charge is called the current and it is the rate at which electric charges pass though a conductor. The charged particle can be either positive or negative. In a series circuit, all components are connected end-to-end, forming a single path for electrons to flow. o In a parallel circuit, all components are connected across each other, forming exactly two sets of electrically common points. o A "branch" in a parallel circuit is a path for electric current formed by one of the load components (such as a resistor). Parallel Circuits are used in more advanced lighting systems and usually used to reduce electricity where a lot of devices are being used. Serial Circuits are mostly used in simple o

systems where it doesn’t need the current to regulate. Current - is the flow of electrons round the circuit. (Ammeter) Voltage - is the driving force that pushes the current round. (Voltmeter) Resistance - is anything in the circuit that slows the flow down. (Resistor) There is a relationship between these three which is summarized as Ohm’s Law (V=IR) voltage=Current x Resistance So if you increase the voltage - then more current will flow, if the resistance is constant. If you increase the resistance - then less current will flow if voltage remains constant. We use electricity everyday, and it’s important that we are safe around it. Some of the most important safety precaution is never to touch any wire or appliance with wet hands. Secondly, never fiddle or dismantle a wire, or a power point. Thirdly, always remember not to overload power points with too many devices. Fourthly, be careful when there is a thunderstorm as it might cause the electricity to escape and be transferred through the house’s power line. Lastly, Always turn off the appliance before removing it.