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Transcript
Definition Symbol Voltage Push on the electrons V Current Rate of flow of electrons Charge Total number of charged particles Energy Amount of energy given to a component Resistance How hard it is for electrons to flow Power How fast energy is transferred Unit Volts Unit Symbol V • Safety Features: Double Insulation: Outer case is _____ so it will always be safe to touch. Insulation: _____ outside cable safe to touch Earthing: outside casing connected to _____ Circuit Breaker: Trips if too big a ____ flows Fuse: _____ if too big a ____ flows • Wiring a Plug: Fuse on the live Wire Green/Yellow: Earth Brown: ______ Blue: _______ Definitions Equations Mains Electricity Mnemonic Equation Units Exercise Is Very tiring E=IVt J=AVs Series and Parallel Circuits Peter is a Veggie QuIt Very Important Rabbits Resistor Bulb I Diode I V I V V Series Circuit Current Voltage Circuits IV Graphs • Hazards: Frayed Cables Damaged Plugs Water Don’t play with sockets Component Function Diode Only lets the current through one way Thermistor Senses _____ (low ______ high _____) LDR Senses _____ (low ______ high _____) Symbol Parallel Circuit Definition Symbol Unit Unit Symbol Voltage Push on the electrons V Volts V Current Rate of flow of electrons I ampere A Charge Total number of charged particles Q coulomb C Energy Amount of energy given to a component E joule J Resistance How hard it is for electrons to flow R ohm Ω Power How fast energy is transferred P watt W • Safety Features: Double Insulation: Outer case is plastic so it will always be safe to touch. Insulation: plastic outside cable safe to touch Earthing: outside casing connected to earth Circuit Breaker: Trips if too big a current flows Fuse: melts if too big a current flows • Wiring a Plug: Fuse on the live Wire Green/Yellow: Earth Brown: live Blue: neutral Definitions Equations Equation Units Exercise Is Very tiring E=IVt J=AVs Peter is a Veggie P = I V W = A V QuIt Q = I t C = A s Very Important Rabbits V = I R V = A Ω Series and Parallel Circuits Circuits IV Graphs Resistor Bulb I V I V Series Circuit Parallel Circuit Current same split Voltage split same Less Cabling If one breaks rest still work and/or same voltage Diode I Mains Electricity Mnemonic • Hazards: Frayed Cables Damaged Plugs Water Don’t play with sockets V Component Function Diode Only lets the current through one way Thermistor Senses Temp (low resistance high temp) LDR Senses Light (low resistance high light) Symbol