Topic 2 - Revision Questions... Graphs and Diagrams

Annotate how the resistance of a thermistor changes with the change of temperature.

As the Temperature increases, the Resistance is lower.

As the Resistance increases, the Temperature is lower.

Annotate how the resistance of a Light Dependant Resistor (LDR) changes with light intensity

The Higher the light intensity, the lower the Resistance.

The Lower the light intensity, the higher the Resistance.

Draw a Metalic Structure... Why does resistance increase with temperature for metals?

Atoms vibrate as the temperature rises. Collisions with Electrons are more likely to happen.

Annotate how current varies with potential difference filament lamps.

The Resistance of a filament lamp increases as the Temperature of its filament increases.

The Current flowing through a filament lamp is not directly proportional to the voltage across it.

Annotate how current varies with potential difference diodes.

The Diode has a Very High Resistance in one direction.

This means that the Current can only flow in the other direction.

Annotate how current varies with potential difference for fixed resistors.

The Current flowing through a Resistor at a constant temperature is directly proportional to the Potential Difference (Voltage) across it.