Resistance Flashcards
1
Q
What is the equation linking pd and current
A
V=IxR
Potential difference,V)=(current,A)x(resistance
2
Q
List factors which affect resistance :
A
- whether the components are in series or parallel
- wire length
3
Q
What is the role of an Ammeter ?
A
To measure the current flowing through the wires
It must be placed in SERIES !
4
Q
What is the role of a voltmeter ?
A
To measure the pd across the wires
The voltmeter must be placed in PARALLEL around whatever you’re investigating
5
Q
What does the term “I-V characteristics” refers to ?
A
A graph which shows a current (I) flowing through a component changes as the potential difference (V) across it is increased .
