IV Graphs

What do IV Graphs examine?

• The relationship between current and potential difference

• The relationship between current and temperature

• The relationship between charge and resistance

• Ohms Law

Identify the component represented in this graph

• Ohmic conductor

• LDR

• Filament Bulb

• Fixed Resistor

In a filament bulb, the current does not (a)   as fast as the potential difference.

Identify the component represented in this graph? Two answers are correct:

• Filament Bulb

• Ohmic Conductor

• Variable Resister

• Fixed Resistor

For a fixed resistor, the potential difference is ..................... .................... to the current

(a)  

Identify the component represented by this graph:

• Diode

• Fixed Resistor

• Filament Bulb

• Cell

Explain your answer to the previous Q.

Use a description of the graph to support your answer (2 marks)

Explain how temperature affects resistance (2 marks)

Using your understanding of temperature and resistance, why does the Current/P.d Graph for a filament bulb look like this? Use the graph to support your answer (3 marks)

A diode (or semiconductor) only allows current to flow ............... ....................

This explains why the graph has a flat line before alternating the current flowing through the diode.

(a)