A teacher is concerned about accidentally tripping his mercury alarm with a giant solenoid you build for him and has asked you to determine how much power is dissipated as heat by the wires of the solenoid. The resistivity of copper is 1.68 × 10−8 Ω·m. Side note: the solenoid is one layer of tightly-wrapped 12-gauge copper wire (diameter is 0.2032 mm). It is to be 3.5 meters tall and square in shape with 0.75-m long sides.

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Chapter10: Direct-current Circuits
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A teacher is concerned about accidentally tripping his mercury alarm with a giant solenoid you build for him and has asked you to determine how much power is dissipated as heat by the wires of the solenoid. The resistivity of copper is 1.68 × 10−8 Ω·m.

Side note: the solenoid is one layer of tightly-wrapped 12-gauge copper wire (diameter is 0.2032 mm). It is to be 3.5 meters tall and square in shape with 0.75-m long sides. 

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