current Flashcards
1
Q
electric current
A
a flow of electrons from negative to positive
2
Q
what does there need to be for current?
A
a source of potential difference
3
Q
what is current measured in?
A
amps
4
Q
what does the size of current depend on?
A
resistance and potential difference
5
Q
what happens to the current as the resistance increases?
A
it decreases
6
Q
size of current
A
the rate of flow of electric charge
7
Q
charge
A
current x time/Q=It
8
Q
give units for charge equation
A
current-amperes
charge-coulombs
time-seconds
9
Q
what direction does current flow?
A
negative to positive
10
Q
what do the electrons carry?
A
energy from the cell
11
Q
what happens to the energy the electrons carry?
A
it is passed to the components in the circuit
12
Q
how can you measure current?
A
using an ammeter
