is the flow of electric charge round the circuit.Current will only flow through a component if there is a potential difference across the component Unit:ampere, A
1 of 17
What is the potential difference?
is the driving force that pushes the current round. Unit: volt, V
2 of 17
What is the resistance?
is anything in the circuit which slows the flow down. Unit: ohm
3 of 17
What is the rule of resistance and current?
The greater the resistance across the component , the smaller the current that flows (for a given potential difference across the component)
4 of 17
Total charge through a circuit depends on?
current and time
5 of 17
Current is the rate of?
flow of charge
6 of 17
When current (I) flows past a point in a circuit for a length of time (t) then?
the charge (Q) that has passed is given by this formula
7 of 17
Current is measured?
amperes (A)
8 of 17
Charge is measured in?
coulombs (C)
9 of 17
Time is measured in?
seconds (s)
10 of 17
More charge is passed around the circuit when?
a bigger current flows
11 of 17
What are the same formulas for current?
current=charge divided by time I=Q divided by T
12 of 17
What is the potential difference?
the work done per unit charge
13 of 17
The potential difference (voltage) is the work done per coulomb of charge that?
passes between two points in an electrical unit
14 of 17
So the potential difference across an electrical component is?
the amount of energy that is transferred by that electrical component per unit of charge
15 of 17
Voltage and potential difference means?
same thing
16 of 17
Whats the formula for pd?
pd=work done divided by charge W divided by v times Q
17 of 17
Other cards in this set
Card 2
Front
What is the potential difference?
Back
is the driving force that pushes the current round. Unit: volt, V
Comments
No comments have yet been made