2.1 conduction of electricity Flashcards
(3 cards)
1
Q
Electric current, I
A
This is the rate of flow of electric charge. I = ∆Q / ∆t Unit: A
2
Q
Efficiency if a system
A
% Efficiency = 100 × useful work (or energy) out / work (or energy) put in
3
Q
Drift velocity
A
Mean (net) velocity of electrons in one direction due to an applied pd
