1. Charge and Current: More Practice

2. Charge and Current: More Practice

3. Charge and Current: More Practice

4. Charge and Current: More Practice

5. 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

6. 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.

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

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

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

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

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

12. 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

13. Circuit Symbols
We can represent circuits with schematic diagrams:

14. Circuit Symbols
We can represent circuits with schematic diagrams:

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

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

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

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

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

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

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

22. 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.