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A room has AC run for …

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A room has AC run for 5 hour a day at a voltage of 220V. The wiring of the room consists of Cu of 1mm radius and a length of 10m. Power consumption per day is 10 commercial units. What fraction of it goes in the joule heating in wires? What would happen, if the wiring is made of aluminum of same dimensions? (Given resistivity of Cu is 1.7×10^-8 ohm-metre and resistivity of aluminium is 2.7×10^-8 ohm-metre).

Posted by Ayushi Kurmi 5 years ago

CBSE > Class 12 > Physics

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