# ENERGY AND ELECTRICITY

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• Created by: Pippa124
• Created on: 30-03-14 16:06
• Energy and Electricity
• Energy Transfers
• Active energy
• Kinetic (movement)
• Sound
• Light
• Thermal (heat)
• Electrical
• Stored Energy
• Chemical
• Gravitational
• Strain (elastic)
• Energy transfer system:
• shows the energy being put into the system and the energy coming out of the system
• ENERGY IMPUT - PROCESS - ENERGY OUTPUT
• Eg: chemical energy - turning on a torch - electrical, thermal and light energy
• eg: electrical energy - lightbulb - thermal and light energy
• Energy is measure in Joules (J)
• Sanki Diagrams
• Shoes how much energy is going in, how much is useful and how much is wasted.
• The useful energy goes horizontal and the wasted energy goes downwards.
• All the energy imputed is shown on the left.
• eg:
• Power stations
• 1. the fuel is burned to boil water to make steam.
• 2. the steam makes a turbine spin.
• 3. the spinning turbine turns a generator which produces electricity.
• 4. the electricity goes tot the transformers to produce the correct voltage.
• FUEL BURNED, STEAM MAKES TURBINE SPIN, TURNS GENERATOR, MAKES ELECTRICITY,
• The energy needed to boil the water comes from fossil or nuclear fuels. Renewable energy sources such as wind and wave power may drive the generators directly.
• ENERGY (kWh) = POWER (kW) * TIME (h)
• Seris Circuit                                                                                                                                                                Parallel Circuit
• Current (I) - is the flow of charge. Measured using an ammeter
• Voltage (V) - is the difference in electrical energy between 2 points.
• Resistance (R) - is the resistance of current.
• RESISTANCE = VOLTAGE / CURRENT
• In a seris circuit the voltage splits between the bulbs. In parallel the voltage stays the same between the two bulbs.
• In a seris circuit the current remains the same. In parallel the current splits.
• SYMBOLS: