Overview
Record the current voltage characteristic of an incandescent lamp.
The I-V characteristics of an incandescent lamp show how the current changes with varying voltage. The filament, usually made of tungsten, heats up and emits light as current flows through it. The relationship between voltage and current is nonlinear because the filament’s resistance increases as it heats up.

Significance

• Studying the non-linear relationship between current and voltage in resistive materials.

• Determining the power consumption of the lamp at different voltages.

• Exploring how temperature affects the resistance of materials.

The data from the I-V curve also helps estimate the lamp’s operating conditions and predict its behavior at different voltage levels.