Question 2. Residential building codes typically require the use of 12-gauge cop- per wire (diameter 0.205 cm) for wiring receptacles. Such circuits carry currents as large as 20.0 A. If a wire of smaller diameter (with a higher gauge number) carried that much current, the wire could rise to a high temperature and cause a fire. (a) Calculate the rate at which internal energy is produced in 1.00 m of 12-gauge copper wire carrying 20.0 A. (b) Repeat the calculation for a 12-gauge aluminum wire. (c) Explain whether a 12-gauge aluminum wire would be as safe as a copper wire.
Question 2. Residential building codes typically require the use of 12-gauge cop- per wire (diameter 0.205 cm) for wiring receptacles. Such circuits carry currents as large as 20.0 A. If a wire of smaller diameter (with a higher gauge number) carried that much current, the wire could rise to a high temperature and cause a fire. (a) Calculate the rate at which internal energy is produced in 1.00 m of 12-gauge copper wire carrying 20.0 A. (b) Repeat the calculation for a 12-gauge aluminum wire. (c) Explain whether a 12-gauge aluminum wire would be as safe as a copper wire.
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Transcribed Image Text:Question 2. Residential building codes typically require the use of 12-gauge cop-
per wire (diameter 0.205 cm) for wiring receptacles. Such circuits carry currents as
large as 20.0 A. If a wire of smaller diameter (with a higher gauge number) carried
that much current, the wire could rise to a high temperature and cause a fire.
(a) Calculate the rate at which internal energy is produced in 1.00 m of 12-gauge
copper wire carrying 20.0 A.
(b) Repeat the calculation for a 12-gauge aluminum wire.
(c) Explain whether a 12-gauge aluminum wire would be as safe as a copper wire.
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