Two different wires, of the same cross-sectional area, are connected in series as part of a circuit. The conductivity of wire 1 is larger than the conductivity of wire 2. Part (a) If the electric field in wire 1 is E1, and the electric field through wire 2 is E2, write an expression for the ratio between the conductivity of the two wires. σ1 / σ2 = ______ Part (b) If E1 = 0.85 V/m and E2 = 0.061 V/m, what is the ratio between the conductivity of the wires? σ1 / σ2 = ______

Two different wires, of the same cross-sectional area, are connected in series as part of a circuit. The conductivity of wire 1 is larger than the conductivity of wire 2. Part (a) If the electric field in wire 1 is E1, and the electric field through wire 2 is E2, write an expression for the ratio between the conductivity of the two wires. σ1 / σ2 = Part (b) If E1 = 0.85 V/m and E2 = 0.061 V/m, what is the ratio between the conductivity of the wires? σ1 / σ2 =

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter28: Current And Resistance

Section: Chapter Questions

Problem 9PQ

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Concept explainers

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.

Question

Problem 15: Two different wires, of the same cross-sectional area, are connected in series as part of a circuit. The conductivity of wire 1 is larger than the conductivity of wire 2.

Part (a) If the electric field in wire 1 is E₁, and the electric field through wire 2 is E₂, write an expression for the ratio between the conductivity of the two wires.

σ₁ / σ₂ = ______

Part (b) If E₁ = 0.85 V/m and E₂ = 0.061 V/m, what is the ratio between the conductivity of the wires?

σ₁ / σ₂ = ______

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