Electricity Flashcards
1
Q
Define Current
A
The rate of flow of electric charge
2
Q
Define electromotive force (emf)
A
The amount of electrical work done per unit charge by a power supply such as a cell in a circuit
3
Q
Define potential difference (pd)
A
It is the amount of electrical work done per unit charge flowing through a component
4
Q
What is Ohms law
A
V = IR Current flowing through is proportional to the pd applied.
5
Q
What is resistivity?
A
The intrinsic resistance of the material that the substance is made from.
6
Q
What is a superconductor?
A
A material whose resistance drops to 0 below a specific temperature, which is called the critical temperature
