Charge and Current: More Practice

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Presentation transcript:

Charge and Current: More Practice

Charge and Current: More Practice

Charge and Current: More Practice

Charge and Current: More Practice

A Review of Circuits: Student Learning Goal The student will be able to construct and then compare and contrast the behaviour and functions of series and parallel DC circuits

Circuits A circuit consists of at least one power source (such as a battery) and one load (such as a light bulb). The two need to be connected in a complete, closed loop.

Circuit Symbols We can represent circuits with schematic diagrams using the following symbols:

Circuit Symbols We can represent circuits with schematic diagrams using the following symbols: Single power cell

Circuit Symbols We can represent circuits with schematic diagrams using the following symbols: Single power cell Multiple cells

Circuit Symbols We can represent circuits with schematic diagrams using the following symbols: Single power cell Multiple cells Connecting wire

Circuit Symbols We can represent circuits with schematic diagrams using the following symbols: Single power cell Multiple cells Connecting wire Load/resistor

Circuit Symbols We can represent circuits with schematic diagrams using the following symbols: Single power cell Multiple cells Connecting wire Load/resistor Open switch Closed switch

Circuit Symbols We can represent circuits with schematic diagrams:

Circuit Symbols We can represent circuits with schematic diagrams:

Ammeters To measure the current (I) in an electrical circuit, an ammeter may be placed in the circuit: ammeter load cell

Voltmeters The voltage across any part of a circuit may be measured by placing a voltmeter across it:

Power The power (in Watts) delivered to a circuit or consumed by a load is:

Power: Example A 9-V battery is connected to a load that draws 2 A. What is the power consumed by the load?

Power: Example A 9-V battery is connected to a load that draws 2 A. What is the power consumed by the load?

Power: Example A 9-V battery is connected to a load that draws 2 A. What is the power consumed by the load?

Power: Example A 9-V battery is connected to a load that draws 2 A. What is the power consumed by the load?

A Caution Remember never to make a circuit connecting one terminal of the battery to the other without something to consume the power (such as a light bulb) in between. This would be a short circuit.