2) a) A 40-m length of copper wire at 20 deg c has a diameter of 0.3 mm. If a potential difference of 10 V is applied accross the length of the wire, determine the current in the wire b) If the wire is heated to 40 deg C while the 10-V potential is maintained, what is the resulting current in the wire?

2) a) A 40-m length of copper wire at 20 deg c has a diameter of 0.3 mm. If a potential difference of 10 V is applied accross the length of the wire, determine the current in the wire b) If the wire is heated to 40 deg C while the 10-V potential is maintained, what is the resulting current in the wire?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter28: Current And Resistance

Section28.3: Current Density

Problem 28.3CE

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