I-V characteristics practical

Question 1

Describe an ohmic conductor

Answer 1

1) Current is directly proportional to potential difference

2) So you get a straight line

Question 2

Describe an Filament lamp

Answer 2

1) Temperature increases as current increases
2) So resistance increases
3) This make sit harder for current to flow
4) So the graph gets less steep

Question 3

Describe a diode

Answer 3

1) Current only flows in 1 direction

2) The diode has very high resistance in the reverse direction