Talking about investigating the resistance of a wire

Aim: The aim of this is to investigate how the length of a cable affects the foe of it. Theory opposition is a force, which opposes the flow of an electric occurrent around a electric lot so that energy is required to push the aerated particles around the circuit. The circuit itself can stand the flow of particles if the wires be either precise thin or very long. E.g. the filum across an electric bulb is quite thin as needs to resist the flow of particles for the bulb to glow. Resistance is measured in ohms. George Ohm observe that the voltage of a circuit is directly comparative to the current flowing through the circuit. This means that if you three-fold one, you triple the other. He alike discovered that a circuit sometimes resists the flow of electricity. He called this opposite. He because came up with a rule for working away the foe of a circuit: V/I = R V - Volts I - Current R - Resistance down the stairs are the facts that I need to consider when ca nvass the resistance of metals: 1. Electrical conductivity involves impelment in aerated particles. An galvanising current means they are Mobile supercharged Carrier. In metals this means moving electrons. In graphite (carbon) the current is consume to the electrons.

If the particles arent charged or have no movement then(prenominal) the material is an insulator e.g. plastic, rubber or solid commonalty salt. Solid salt contains charged particles, which are called ions, but these are not ready in its solid state: 2. Resistance to the current is imputable to the electrons trying to loll around earl y(prenominal) the atoms. When metals get hea! ted the particles at bottom begin to move more and there is more resistance to the flow of electrons. 3. Ohms police describes the relationship between electrical... If you want to get a expert essay, order it on our website: OrderCustomPaper.com

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