E4 Introducing Electricity Part 1
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This document introduces basic concepts of electricity and electrical circuits. It discusses two main sources of electricity - mains electricity and electric cells. Circuits require a closed loop and components like cells, bulbs, switches and wires to allow current to flow. Symbols are used to represent electrical components in circuit diagrams. The document provides examples of open and closed circuits and tasks to analyze different circuits.
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1. Electrical circuits allow the transfer of chemical energy from cells or batteries into electrical energy to power components like lamps. A circuit provides a continuous path for electric current to flow through wires and components.
2. There are two main types of circuits - series circuits where the components are connected end to end in one loop, and parallel circuits where the current has multiple paths through components connected side by side.
3. Electric current is measured in amps using an ammeter connected in series in the circuit. Voltage, the "electrical push" provided by cells, is measured in volts using a voltmeter connected across circuit
Chapter 4 battery and bulb
The document provides instructions on how to create a simple electric circuit using a battery, wire, and bulb. It explains that the goal is to connect the components in different arrangements to try lighting the bulb, drawing each attempted configuration. It also discusses key electric circuit concepts like closed and open circuits.
12 electriciy
This document provides information about basic electric circuits, including:
1) Circuit symbols are used to simplify diagrams of electrical components like batteries, bulbs, switches, etc.
2) Materials are classified as conductors that allow electricity to flow or insulators that do not.
3) Electric current is actually a flow of electrons through a circuit from the negative terminal of a battery to the positive terminal.
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E4 Introducing Electricity Part 1
- 2. Introducing Electricity – Part 1
- 5. Cross section of a torch switch
- 9. Spot the differences A B
- 11. Open Circuit
- 18. Analysing, explaining Circuit diagram A is the same as for Circuit 1 in Fig. E4.6. (The extra line between the two cells is unnecessary but not wrong). Circuit B is different as the light bulb is situated between the two cells.
- 19. Symbols of some electrical components
Editor's Notes
- Mains electricity Supply a lot of electrical energy Can give us an electric shock Appliances, usually portable Generated in power stations Electric cells Supply only a small amount of energy Safe to touch Appliances need to be plugged into a mains socket Generated from chemicals in the cells