Which everyday device uses the principle of capillary action to function?
A
Thermometer
B
Candle wick
C
Barometer
D
Magnet
Correct Answer: Option B — Candle wick
Explanation:
A candle wick uses capillary action to draw melted wax upward toward the flame allowing continuous burning as the liquid wax is pulled through the narrow fibers of the wick.