L10 - I-V characteristics non-ohmic conductor

Question 1

what is the shape of the graph when it is a fixed resistor?

Answer 1

directly proportional diagonal line.

Question 2

what is the shape of the graph when it is a filament lamp?

Answer 2

s shape.

Question 3

what is the shape of the graph when it is a diode?

Answer 3

first straight then turns into small s.

Question 4

what does a fixed resistor graph show?

Answer 4

as the p.d difference increases, current also increases. current is directly proportional to voltage.

Question 5

what does a filament lamp graph show?

Answer 5

as the p.d difference increases, the current starts to increase less and less each time because the filament lamp gets hot. this makes resistance go up.

Question 6

what does the diode graph show?

Answer 6

when diode is connected right way round, current flows as voltage increases. if connected other way round then no current flows and resistance is high.

Question 7

dependent, independent and control variable for ohmic resistors.

Answer 7

dv:current and potential difference
iv:resistance
cv:voltage supply