This document discusses the basics of electricity and electrical circuits. It explains that electricity is the flow of electric charges through a wire, just as water flows through a river. An electrical circuit needs three main components - a power source like a battery, a load such as a light bulb, and wires or other connectors to complete the circuit. It also discusses concepts like open versus closed circuits, and how changing components like batteries or bulbs affects brightness. Symbols are introduced for common circuit elements. Worksheets are included to have the reader draw sample circuits.

1. Electricity

2.  charges move in a wire the way water
flows in a river.

3. Current electricity
Or
Electric current
The flow of electrical charges is
known as:

4. What gives us current electricity?

5. Think ! Will this bulb light ?
What is missing?
A battery ( power source )

6. Think ! Will this bulb light ?
What is missing?
A wire ( connector )

7. Think ! Will this bulb light ?
What is missing?
A bulb ( load )

8. circuit
The path which electric current flows

9. Power source
cell
battery

10. Load
buzzer
motor
Bulb or lamp

11. Connector
wire

12. Power source Load Connector
wire
cell
battery
buzzer
motor
bulb

13. From where does the current flow? From the (-)
or (+) ?

15. Incomple
te circuit
open circuit
broken
circuit

16. complete
circuit
closed circuit
unbroken
circuit

17. What is the switch used for?

19. Closed circuit or open circuit?

21. Closed or open circuit?

22. Closed or open circuit?

23. If Iadded more batteries to a circuit,
what will happen to the bulb?
The electric energy increase, so the bulb glows
brighter

24. If Iadded more bulbs to a circuit?
The electric energy decrease, so the bulb glows
dimmer

25. If Iadded longerwires to a circuit?
The electric energy decrease as it travels more, so the
bulb glows dimmer

27. Symbols
• We use the circuit symbol to make it easier for
us to draw a circuit.

28. Bulb ( off )

29. Wire

30. Switch ( off )

31. Switch ( on )

32. Buzzer

33. Motor

34. Cell

36. Solve extra worksheet

37. Draw a circuit

38. Draw a circuit

39. Draw a circuit

40. Draw a circuit

41. Draw a circuit

42. Draw a circuit

43. 1 cell, 2 lamps

44. 2 cells, 2 lamps, switch ON

45. 1 battery, 1 bulb, switch OFF

46. 1 cell, 1 motor

47. 1 buzzer, 1 motor, 2 cell

48. 1 cell, 3 buzzer

49. 1 cell, 1 buzzer, 1 motor