Physics for IGCSE & O level - Electricity (Section 4 - No. 2)
What happens to the brightness of a light bulb if the current flowing through it decreases?
It gets brighter
It gets dimmer
It stays the same
It burns out
คำอธิบาย
The brightness of a light bulb is directly proportional to the current flowing through it, so a decrease in current leads to a dimmer bulb.