2. Three things Charge Flow Energy

3. Charge and Flow An electric current is the “flow of charge”

4. Units Current is measured in AMPS Charge is measured in COULOMBS Time is measured in SECONDS

5. Symbols in Equations Current is shown by the letter I Charge is shown by the letter Q Time is shown by the lettert

6. Word link Current is the flow of charge If 1 coulomb of charge passes through a point in 1 second then we say the “current is 1 Amp” Current in amps is the amount of charge that flows every second

7. Formula link Current = Charge ÷ time I = Q ÷ t

8. Examples What is the current if 6 coulombs of charge pass around a circuit in 3 seconds?

9. Examples What is the current if 6 coulombs of charge pass around a circuit in 3 seconds? Formula I = Q ÷ t

10. Examples What is the current if 6 coulombs of charge pass around a circuit in 3 seconds? Formula I = Q ÷ t Substitution6 ÷ 3

11. Examples What is the current if 6 coulombs of charge pass around a circuit in 3 seconds? Formula I = Q ÷ t Substitution6 ÷ 3 Calculation 2 Amps Look at the example box on your worksheet page 245 and Question 1

12. Formula link as it appears on your formula sheet Current = Charge ÷ time I = Q ÷ t Rearranged (use a triangle ) Q= I x t