In an oil lamp, the oil rises up in the wick due to?
Correct answer: B. Capillary action
- A. Atmospheric pressure
- B. Capillary action
- C. Viscosity of oil
- D. Change in temperature
Explanation
Narrow spaces between the fibres of a wick pull oil upward through capillary action, caused by adhesion to the fibres and cohesion within the oil.
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