APPLIED SCIENCES ASSIGNMENT ELECTRICITY UNIT 15 A AND B COURSEWORK.

APPLIED SCIENCES ASSIGNMENT ELECTRICITY UNIT 15 A AND B COURSEWORK. UNIT 15: ELECTRIC CIRCUITS AND THEIR APPLICATIONS COMPONENTS SYMBOLS Cell Battery Switch (open switch) (closed switch) Filament lamp/ bulb Resistor Thermistor Light emitting diode (LED) Light dependent resistor(LDR) Rheostat Capacitor Voltmeter Ammeter Reference 1: By John Hewes (2020) lOMoARcPSD|  Current (ampere): Electrical current is the flow (movement) of electric charges. For an electric charge to flow there has to be a source of potential difference and a closed (or complete) circuit. An electric current is the flow (movement) of electric charges. Electric current is measured in amperes (A). The flow of charge (C) = current (A) x time (s). A current has the same value at every point in a single closed loop. The current is equal to the charge divided by the time. I = Q/T  Potential difference (volt): Potential difference is the difference in the amount of energy that charge carriers have between two points in a circuit. Measured in Volts: Potential difference (p.d.) is measured in volts (V) and is also called voltage. The energy is transferred to the electrical components in a circuit when the charge carriers pass through them. We use a voltmeter to measure potential difference (or voltage).Potential Difference formula:** V = I x R** The potential difference (which is the same as voltage) is equal to the amount of current multiplied by the resistance. A potential difference of one Volt is equal to one Joule of energy being used by one Coulomb of charge when it flows between two points in a circuit.  Electrical charge (coulomb): The SI unit of charge, the coulomb , is the quantity of electricity carried in 1 second by a current of 1 ampere. Conversely, a current of one ampere is one coulomb of charge going past a given point per second. In general, charge Q is determined by steady current I flowing for a time t as Q = It.  Resistance (ohm): Resistance is a measure of how much a component decreases the current. The bigger the resistance, the smaller the current. Resistance is measured in ohms (symbol Ω). V=IR  Conductance (Siemen): Conductance is the measure of how easily electricity flows along a certain path through an electrical element, and since electricity is so often explained in terms of opposites, conductance is considered the opposite of resistance. In terms of resistance and conductance, the reciprocal relationship between the two can be expressed through the following equation: R = 1/G, G=1/R; where R equals resistance and G equals conduction. Another way to represent this is: W=1/S, S=1/W, where W (the Greek letter omega) represents resistance and S represents Siemens, ergo the measure of conductance. In addition, Siemens can be measured by comparing them to their eq