2. Electric Current
• Current is the rate of flow of “positive
charges”.
• Its direction is opposite to the flow of
electrons.
• This is because electric current was discovered
before the atomic model.
• Current is denoted by I. Its SI unit is Ampere
(A).
4. Voltage (V)
Voltage can be see as the height difference. If there is a height differnce
(Voltage). Electricity will flow.
Voltage is denoted by V. SI unit of voltage is Volt (V)
5. Resistence
When electrons flow in a wire they, hit other atoms and slow down. This
provides a resistance to their flow. This resistance can be measured.
