current electricity Flashcards
1
Q
what is it?
A
it is the study of electric charge which in constant motion in a close circuit
2
Q
what is an electric current?
A
flow of charge from one point to another in an electrical circuit.
3
Q
conventional current is
A
is a flow of positive charge
direction from + to -
4
Q
flow of electrons
A
- to +
5
Q
potential difference formula
A
V = W/Q
6
Q
definition of potential difference
A
it is the work done per unit charge to move the charge between two points in a circuit
7
Q
resistance definition
A
it is the ratio of the potential difference across a component to the current through the component.
8
Q
resistance formula
A
R= V/I
9
Q
current definition
A
it is the rate at which charge passes a given point in a circuit.
