Electrotechnology - DC Circuits: (01)The Basics.

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Presentation transcript:

Electrotechnology - DC Circuits: (01)The Basics

What have we actually seen? What metal are most cables and wires made from? What units are used to measure the difference in charge between two points? Is the voltage across the terminals of a battery exactly equal to the voltage printed on it? What is meant by the bands of colour on a resistor? What is produced when electric current flows through a resistor?

Electrotechnology - DC Circuits: (01)The Basics Activity 1 Print this page and draw, in red pen, the path that the current must have taken to complete the circuit.

Electrotechnology - DC Circuits: (01)The Basics Activity 2 Find the “Resistor Colour Code” on the Internet and print it out. Use it to work out the resistance of the resistor in the experiment. Find the “Resistor Colour Code” on the Internet and print it out. Use it to work out the resistance of the resistor in the experiment.

Electrotechnology - DC Circuits: (01)The Basics Activity 3 Reconnect the circuit and watch what happens to the battery voltage over a period of time. Explain your observations. Reconnect the circuit and watch what happens to the battery voltage over a period of time. Explain your observations.

Electrotechnology - DC Circuits: (01)The Basics Activity 4 Disconnect the resistor and then test the terminal voltage again. This is the open-circuit voltage or no-load voltage. Note any changes. Disconnect the resistor and then test the terminal voltage again. This is the open-circuit voltage or no-load voltage. Note any changes.

Electrotechnology - DC Circuits: (01)The Basics Finish