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P2: Electricity Booklet 1

P2: Electricity Booklet 1. Name: _______________________ Teacher: _______________________ You are reminded for the need to complete all work to the best of your ability and the need for good presentation throughout. What is meant by resistance?.

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P2: Electricity Booklet 1

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  1. P2: Electricity Booklet 1 Name: _______________________ Teacher: _______________________ You are reminded for the need to complete all work to the best of your ability and the need for good presentation throughout.

  2. What is meant by resistance? Why does the resistance in a wire increase with temperature? The equation for resistance is The resistance on a voltage-time graph is shown by? A voltage-current graph for a ‘wire’ at constant temperature: This is a straight line because.. A voltage-current graph for a ‘filament lamp’: This is a curve because.. A voltage-current graph for a ‘diode’: This is a shaped like this because..

  3. What is a variable resistor? A RESISTANCE graph for a ‘LDR’: This is a curve because.. What is a Diode? What is a LDR? A RESISTANCE graph for a ‘thermistor’: This is a curve because.. What is a Thermistor?

  4. What is meant by resistance? How is the resistance calculated in a series circuit? What is meant by series circuit? What is meant by a parallel circuit? How is the resistance calculated in a parallel circuit? If the resistance is high, what happens to the current? Why?

  5. A hair dryer has the following components - 1 motor, 2 bulbs, two heaters and a fan. The hair dryer can work with either 1 heater or both on and the bulbs indicate which heaters are on. Which circuit is best? Draw a circuit diagram for this device: Why is this the best circuit? What circuit is best to be used for Christmas tree lights? Draw a circuit diagram for this device: Why is this the best circuit to use?

  6. What is meant by A.C.? How does this a.c. and d.c. look on an oscilloscope? What is meant by D.C. and where is it used? What voltage is the UK main supply? What frequency is the UK main supply? What does this mean? How do you work out the frequency of a wave?

  7. List some of the ways to reduce electrical hazards in the home: Explain why we have 3 pins on our plugs in the UK: What is the role of the fuse in the plug? Draw a inside of a plug and label the wires correctly: Why do we have a plastic case to the plug? Why do some devices need an Earth?

  8. What is meant by total charge through a circuit? What is the unit of charge? How is total charge calculated? What is meant by the Power of an electrical appliance? What is the unit of Power? How is Power Calculated? How is the energy transferred in a circuit calculated?

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