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प्रश्न
In an oil-cooled transformer, why is cooling oil introduced at the bottom and allowed to rise?
पर्याय
Heated oil becomes lighter and rises carrying heat upward
Cold oil is lighter than hot oil
To prevent convection currents
Oil cannot move downward when heated
MCQ
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उत्तर
Heated oil becomes lighter and rises carrying heat upward
Explanation:
When oil absorbs heat its density decreases, so it rises and carries heat to the tank walls for cooling.
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