Module 4.1 - Electricity: Charge and Current Flashcards
What is conventional current?
Current that flows from positive to negative
What is Electron flow?
Electrons flows from negative to positive
What is Current?
RATE of flow of CHARGE
What is a coulomb?
Unit of charge - J/s
What is the elementary charge (e)?
1.6 x 10^-19
What is the charge of an electron?
- e = - 1.6 x 10^-19
What is the charge of a proton?
+e = 1.6 x 10^-19
Fill the blanks:
Net charge on a particle or object is -1- and a -2- of e
1) quantised
2) multiple
What quantised charge mean?
Means that the charge only has discrete values
What two equations are used to calculate current?
I = Q ÷ t
I = ne
What is current in metals?
Movement of ELECTRONS
What is current in electrolytes?
Movement of IONS.
What are conduction electrons?
DELOCALISED electrons
What is Kirchoff’s first law?
The sum of currents ENTERING a junction in a circuit is EQUAL to the sum of currents LEAVING the junction - a form of conservation of charge.
What is drift velocity?
Average velocity of an electron in a material due to a voltage.
