Characteristics of components Flashcards
1
Q
What I/V graph for a wire look like?
A
A straight line passing through the origin
2
Q
What does the I/V graph for a lamp look like?
A
A curve that decreases in gradient because as resistance increases it becomes hotter
3
Q
What does the I/V graph for a thermistor look like?
A
A straight line through the origin which gradient increases with temperature
4
Q
Why does resistance increase with temperature?
A
The particles vibrate more and charge carriers cannot pass through metal as easily
5
Q
Why does resistance decrease in a thermistor when temperature increases
A
Number of charge carriers increases
