16.5 Electrical Circuits.

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Presentation transcript:

16.5 Electrical Circuits

Electrical Circuits An electric circuit is a complete path through which a charge can flow. For the charge to flow, the path must be a complete loop.

Circuit Diagram Circuit diagrams use symbols to represent parts of a circuit, including a source of electrical energy and devices that are run by the electrical energy. In a simple circuit a battery provides the energy to operate a device such as a bell or a light bulb. A circuit diagram shows the possible complete paths in which charge can flow.

Circuit Diagram In the figure below, show an electrical circuit. The “+” and the “-“on the battery indicate the positive and negative terminals. Arrows show the direction of current, from negative to positive. (Remember; the charge flowing thru the circuit is the electrons which has a “-“charge.)

Circuit Diagram

Series Circuits In a series circuit, charge has only one path through which it can flow. If one element stops functioning in a series circuit, none of the elements can operate.

Series Circuits Example: Old Christmas Tree Lights

Series Circuits

Parallel Circuits In a parallel circuit, electric charge has more than one path that it can flow If one element stops functioning in a parallel circuit, the rest of the elements still can operate.

Parallel Circuits Example: New Christmas Tree Lights

Parallel Circuits

What kind of circuit? 12

What is the difference between a series and parallel circuit? Series: Only one path for the current to flow Parallel: More than one path for the current to flow.

18.4 Assessment Question #1 Identify each circuit as either a series circuit or a parallel circuit.

18.4 Assessment Question #2 Identify each circuit as either a series circuit or a parallel circuit.

18.4 Assessment Question #3 Identify the type of circuit Using Ohm’s Law, calculate the current in the circuit.

18.4 Assessment Question #4 Name two elements that are included in a circuit diagram.

18.4 Assessment Question #5 What is needed to make charge flow through a circuit?

18.4 Assessment Question #6 Identify which of these components are connected directly in series with each other, and which are connected directly in parallel with each other

18.4 Assessment Question #7 Draw a simple series circuit.

18.4 Assessment Question #8 Draw a simple parallel circuit.