1. Road signs Speed limit No right turn Slippery road No entry
Traffic lights ahead
No U-turn

2. Why do we use circuit diagrams?
9.1a Circuit diagrams
Why do we use circuit diagrams?

3. 9.1a Safety issues
If using a power pack instead of cells, turn off the power when you are making, or changing, your circuits.

4. Set the voltage to the level your teacher tells you.
9.1a Safety issues
Set the voltage to the level your teacher tells you.
This also means use the correct number of cells as
instructed.

5. 9.1a Safety issues
Make sure that your hands are dry, and keep water away from your circuits.

6. 9.1a Safety issues
Tell your teacher if anything looks wrong with your equipment, especially if any wires have metal showing

7. Be careful in case any components (parts of the circuit)
get hot.
Don’t leave the circuit connected and switched on if
you have finished using it.

8. Check your circuit diagrams against these:
9.1a Circuit diagrams (answers)
Check your circuit diagrams
against these:
Circuit A

9. 9.1a Circuit diagrams (answers)
Circuit B

10. 9.1a Circuit diagrams (answers)
Circuit C

11. 9.1a Circuit diagrams (answers)

12. 9.1a Circuit diagrams (answers)
Circuit E