Current-voltage Graphs

Question 1

What would a graph look like for a resistor?

Answer 1

• Diagonal line through the origin showing that current and voltage are directly proportional.

Question 2

What would a graph look like for a bulb?

Answer 2

• Curving shape.
• Reistance increases as the temperature of its filament increases.

Question 3

What would a graph look like for a diode?

Answer 3

• Straight line and then shooting up.
• The diode has a high resistance in one directiopn, which means that current can only flow in the other direction.