Physics for IGCSE & O level - Electricity (Section 1 - No. 31)
What happens to the brightness of a lightbulb if the voltage across it increases?
The bulb gets dimmer.
The bulb gets brighter.
The bulb's brightness stays the same.
The bulb doesn't light up.
Giải thích
Increased voltage leads to increased brightness, provided the bulb isn't overloaded.