ENERGY AND ELECTRICITY

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  • Created by: Pippa124
  • Created on: 30-03-14 16:06
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  • 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:

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