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Q:

लैम्प की बत्ती में तेल चढ़ता है, क्योंकि ?

  • 1
    तेल बहुत हल्का है
  • 2
    कैपिलरी क्रिया के कारण
  • 3
    सतह तनाव घटने के कारण
  • 4
    तेल वाष्पशील है
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Answer : 2. "कैपिलरी क्रिया के कारण"
Explanation :

The correct answer is Capillary action. The oil in the wick of an oil lamp rises up due to capillary action. This effect is due to surface tension of liquids. The wick here acts as a capillary tube.

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