1. Electrical Symbols
SNC 1D

2. Drawing a circuit

3. Each item has a symbol
Bulb
Connecting Wires = =

4. Battery
Switch = =

5. Circuit Diagram

6. Series Circuit
Only ONE path for the flow of electrons.

7. Parallel circuit
More than one path for the flow of electrons

8. Measuring Electron flow.
Electron flow = current represented by the letter I (I)
Electrons are so tiny that electrons are grouped into units called a COULOMB (C)
1Coulomb = 6.25 X 1018 electrons.
Each electron carries a negative charge (Q)

9. Calculating Current Current (I) = charge(coulombs) time (secs) I = Q t
= Amperes or amps (A)

10. Ammeter
The current can be measured with an instrument called an Ammeter, symbol: