CURRENT ELECTRICITY Characteristics of Current Electricity.
Post on 01-Jan-2016
CURRENT ELECTRICITYCharacteristics of Current ElectricityPotential Differenceaka VOLTAGEThe difference in electric potential between two points (the positive end and the negative end of a battery)The greater the potential difference in a circuit, the greater the potential energy of each electron traveling through the circuitCauses current to flow in a closed circuitCan be measured using a voltmeterUnits: Volts (V)How Electrons Transfer Energy in a CircuitWhen a light switch is flipped you instantly get light because the electrons that are in the conducting wire push other electrons that are nearby, and they continue this motion, like a chain reactionElectric Currentaka AMPERESElectric current measure the amount of electric charge that passes by a point in an electrical circuit each secondCan be measured using an ammeterUnits: Amperes (A)ResistanceResistance is how much a device/substance slows down the flow of electric current through itEvery substance resists the flow of electric current to a certain degreeWhen a substance resists the flow of electric current it converts the electrical energy into another form of energy, typically heatEx. An element on your stove, light bulbConductors have a low resistance, insulators have a high resistance (more resistance = less conductivity)Can be measured using an ohmmeterUnits: Ohms ()Resistance continuedResistors are useful in circuitsCan control the current or voltage in a circuit because the amount of energy that the electric current has before it enters the resistor is greater than when it leaves because some of the energy is used as it PASSES THROUGH the resistorTYPES OF CIRCUITSSeries CircuitsElectric circuit where all the parts of the circuit are put in line, one following the otherThere is only one path for the electric current to travel alongAt any place in the circuit the current is equalThe energy that the electric current has when it leaves the battery is completely consumed by the time it returns to the batteryParallel CircuitsElectric circuit where the electricity has more than one path that it can followAt any place in the circuit the potential difference is the sameThe current is different in different places in the circuit, depending on the amount of resistance present (smaller resistance = greater current)
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