Module 4.1 Flashcards
What is Conductors?
A material that allows the flow electrical charge. Good conductors have a larger amount of free charge to carry a current.
What is Conservation of charge?
The total charge in a system cannot change.
What is Conventional current?
The flow from positive to negative, used to describe the direction of current in a circuit.
What is Coulomb?
The unit of charge.
What is Electric current?
The rate of flow of charge in a ciruit.
What is Electrolytes?
Substances that contains ions that when dissolved in a solution, act as charge carriers and allow current to flow.
What is Electron flow?
The opposite direction to conventional current flow. Electrons flow from negative to positive.
What is Elementary charge?
The smallest possible charge, equal to the charge of an electron
What is Insulators?
A material that has no free charge carriers and so doesn’t allow the flow of electrical charge.
What is Kirchhoff’s First law?
A consequence of the conservation of charge. The total current entering a junction must be equal to the total current leaving it.
What is Mean drift velocity?
The average velocity of an electron passing through an object.
What is Quantization of Charge?
The idea that charge can only exist in discrete packets of multiples of the elementary charge.
What is Semiconductors?
A material that has the ability to change its number of charge carriers, and so its ability to conduct electricity. LDR and thermistors are both example.
Give two possible examples of possible charge carries.
Electrons - in metals.
Ions - in electrolytes
