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A metal wire of resistivity 5x10-8 Ω.m, cross-section area 4x10-6 m2 and 12m length. If a...

A metal wire of resistivity 5x10-8 Ω.m, cross-section area 4x10-6 m2 and 12m length. If a 20x1020 electrons pass through the wire in 20 sec.. What is the power (in watt) dissipated in the wire (use e = 1.6x10-19 C)?

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