force

1. What is an electric current?
When charge flows from one place to another, an
electric current is produced.
Often this current is electrons moving through a metal
conductor.

2. Illustration of electric current.

3. Illustration of electric current.

4. Units of Charge, Current and Time
Charge is measured in coulombs(C)
Current is measured in amperes(A)
Time is measured in seconds(s)

5. Equation connecting Current, Charge and time

6. How can we draw a circuit?
 A circuit diagram is a good way of representing a circuit. The wires are
represented by lines and they are usually drawn as straight horizontal or
vertical lines. Each component has a circuit symbol. Some of the more
common ones are listed below.

7. Example of Electrical circuit

8. What causes an electric current?
Electrons don’t flow around a circuit unless they receive some sort of force to
push them around.
The electron flow is caused by the battery which has one negative side that
repels the electrons while the other side is positively charged and attracts them.
The arrival of negatively charged electrons at the battery’s positive side soon
brings the overall charge to zero; however, the battery keeps pushing electrons
off its positive side onto its negative side.
The result is that the battery has an electromotive force or e.m.f. which causes
electrons to move. This is also called the potential difference or voltage across
the battery.

9. MODELS OF ELECTRIC CURRENT

10. MODELS OF ELECTRICITY

11. MODELS OF ELECTRICITY

12. THANK YOU
THANK YOU
DAN OYOMBA
(IBMYP PHYSICS TEACHER)