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Simple Circuits

Simple Circuits. Miss. Mirijana Cipetic. 14/02/11. Common student models for current in Simple Circuits. KEY POINT:

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Simple Circuits

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  1. Simple Circuits Miss. MirijanaCipetic 14/02/11

  2. Common student models for current in Simple Circuits KEY POINT: For an electric current to flow there needs to be a path from the positive terminal of the battery into and out of the circuit components (e.g. light globe) and back to the negative terminal of the battery “What's Happening?” Sheet

  3. Simple Circuits Source of electrical energy Source of electrical energy ENERGY User of electrical energy

  4. Simple Circuits +ve -ve Source of electrical energy e.g. battery ENERGY User of electrical energy e.g. light globe = Charged particle/electron

  5. Simple Circuits Summary: * An electric current is the overall movement of charged particles in one direction * To obtain an electric current, there needs to be a continuous circuit from one terminal of a battery to another * An electric current in a circuit transfers energy from the battery to the circuit components. No 'current' is used up in this process. * In most circuits, the moving charged particles are negatively charged electrons that are always present in the wires and other components of the circuit * The battery pushes the electrons in a circuit

  6. Simple Circuits Investigation Problem A: Design a circuit to support a chandelier with 3 lights... Problem B: How can you turn two lights on independently? For example, in your bedroom one light is a reading light and the other is a main light

  7. Simple Circuits Series Circuit: where there is only one path for the charged particles (current) to travel particle/electron = Charged particle/electron

  8. Parallel Circuit Parallel Circuit: where there is more than one path (different direction) for the charged particles (current) to travel = Charged particle/electron

  9. Practical Report Writing Guide AIM & HYPOTHESIS: What is the purpose of the experiment? (To find out, to investigate....). What do you predict/think will happen? METHOD: Write out the steps you followed in order to carry out the experiment

  10. Practical Report Writing Guide RESULTS: What did you find out? Labelled diagrams of your circuits (using correct symbols) DISCUSSION & EVALUATION: Describe what you found out in one or two sentences. Is it what you expected? Were your predictions right or wrong? Discuss simple circuits and the difference between series and parallel circits

  11. Practical Report Writing Guide • DISCUSSION & EVALUATION cont... • Did you design more than one circuit? Discuss any changes/improvements you made to your design • If your circuit designs did not work give reasons why/how it could be improved in the future • You can use your textbook/internet to help research your findings. Make sure you include correct referencing.

  12. Practical Report Writing Guide CONCLUSION: An answer to the aim. A summary of what you found out. Rubrics

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