A cylindrical wire has length 40 cm, cross-sectional area 60 mm², and resistance 3.0 22. The wire is connected across the terminals of a 12-volt battery. (a) (b) (c) Calculate the current in the wire, the power dissipated in the wire, the magnitude of electric field in the wire, and the resistivity of the wire. Include SI units with all answers. In 20 minutes, how much energy does the battery deliver to the wire, and how many electrons pass through the wire? (Again, include SI units where appropriate. Each electron has charge of magnitude 1.6 x 10-19 C.) If the length of this wire were increased while its cross-sectional area remains fixed, would the resistivity of the wire increase, decrease, or remain unchanged? Explain your answer qualitatively, without performing any calculations.

A cylindrical wire has length 40 cm, cross-sectional area 60 mm², and resistance 3.0 22. The wire is connected across the terminals of a 12-volt battery. (a) (b) (c) Calculate the current in the wire, the power dissipated in the wire, the magnitude of electric field in the wire, and the resistivity of the wire. Include SI units with all answers. In 20 minutes, how much energy does the battery deliver to the wire, and how many electrons pass through the wire? (Again, include SI units where appropriate. Each electron has charge of magnitude 1.6 x 10-19 C.) If the length of this wire were increased while its cross-sectional area remains fixed, would the resistivity of the wire increase, decrease, or remain unchanged? Explain your answer qualitatively, without performing any calculations.

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter12: Electronic Control Devices

Section: Chapter Questions

Problem 14RQ

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