Investigating voltage: do and review

Equipment such as a light sensor and data logger can be used to measure and record bulb brightness in lux. Changing the voltage of batteries can affect the brightness of a bulb in a simple circuit. A lower voltage leads to a dimmer bulb and a higher voltage leads to a brighter bulb. A higher voltage can cause the bulb to burn out or blow due to excess heat generated. The results of an investigation can be recorded in a table and presented using verbal and written forms.