# electricity mindmap

• introduction to electrical current
• current,resistance and ohms law
• current is measured of rate of flow of electrical charge through a circuit. a larger current means faster flow
• current can change by increasing and decreasing the potential difference of the circuit.
• components can reduce the size of current called resistance.
• all elements in a circle include wires, resistance current
• resistance is measured of how hard it is for charge to flow round electrical current.
• ohms law
• the connection between current was discovered by Georg ohm in 1827. (voltage/resistance)
• the formula V=I*R is known as ohms law. represented by the symbol
• ohms law is normally written potential difference= current*resistance or V=I*R
• resistance measured in ohms current is measured in amps and potential difference is measured in volts.
• experimenting with resistance
• resistance of wire depends on factors,material,thickness,length and temprature.
• if the length of the wire increases the resistance increases. if the thickness of the wire increases the resistance decreases
• in parrell circuits if the resistores are connected in parrell the total resistance of the circuit reduced.
• in series circuits if resistors are connected in series the total resistance of the circuit increases.
• equation to calculate resistance is R=V/I.