IV Graphs

What do characteristic curves (IV Graphs) show?

• 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

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

Identify the component represented by this graph:

• Diode

• Fixed Resistor

• Filament Bulb

• Cell

An Ohmic Conductor would give a VI graph that is:

• shaped liked an 'S'

• A curve

• A straight, horizontal line

• A straight, sloping line through the origin

Which line shows a fixed resistor with the biggest resistance?

• They're all the same resistance

• Orange

• Green

• Blue

For a filament lamp, when V is increased and the curve becomes less steep, what happens to the resistance?

• Nothing, it stays the same

• The resistance increases

• The resistance decreases

• The resistance goes to zero

Increasing the temperature of a wire will make the resistance of the wire increase because:

• the current will increase

• the negative ions repel the electrons more

• the positive ions vibrate more and get in the way of the electrons

• the electrons will evaporate

A bulb is an Ohmic conductor

• True

• False