11.3 Measuring the Properties of Simple Circuits

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Presentation transcript:

11.3 Measuring the Properties of Simple Circuits (Pages 455-461) Homework: Page 461 # 1, 4, 5, 6, 8

Key Concepts: (Page 461) Circuit diagrams use standard symbols to represent the components of an electric circuit and their connections in the circuit. At a series connection, there is only one path along which electrons can flow. At a parallel connection, there is more than one path along which electrons can flow. An ammeter measures the current and is connected in series.

A voltmeter measures potential difference and is connected in parallel between the terminals of a load. Each pole connection on a meter must race back to the same type of terminal at the electrical source. The potential difference across a battery of cells in series is the sum of the potential difference across each cell.

Circuit Diagrams: What is a circuit diagram? It is diagram that uses standard symbols to represent the components in an electric circuit and their connections.

One Pathway or Multiple Pathways: 2. Compare a series circuit from a parallel circuit. In a series circuit, there is only one path along which electrons can flow In a parallel circuit, there is more than one path along which electrons can flow

An ammeter measures current at a particular location in a circuit 4. Why must an ammeter be connected in series with a load, rather than in parallel, to correctly measure the current through the load? An ammeter measures current at a particular location in a circuit Therefore, it measures the flow of electric charge (current) at the point where a meter is connected in the circuit and is connected in series

5. What does a voltmeter measure? A voltmeter measures the potential difference in V (volts) between 2 points on a circuit. 6. How is a voltmeter connected in a circuit? It is connected in parallel to measure the potential difference across a load.

7. What is the function of a multimeter? It can be used as an ammeter or a voltmeter When set to read current = connected in series When set to read potential difference = connected in parallel