The figure below represents a section of a circular conductor of nonuniform diameter carrying a current of I = 5.50 A. The radius of cross-section A₁ is r₁ = 0.270 cm. A₁ I (a) What is the magnitude of the current density across A₁? A/m² The radius ₂ at A₂ is larger than the radius ₁ at A₁. (b) Is the current at A₂ larger, smaller, or the same? O The current is larger. O The current is smaller. O The current is the same. (c) Is the current density at A₂ larger, smaller, or the same? O The current density is larger. O The current density is smaller. O The current density is the same. Assume A₂ = 24₁. (d) Specify the radius at A₂. mm (e) Specify the current at A₂. A (f) Specify the current density at A₂. A/m²

University Physics Volume 2
18th Edition
ISBN:9781938168161
Author:OpenStax
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Chapter9: Current And Resistance
Section: Chapter Questions
Problem 28P: An aluminum wire 1.628 mm in diameter (14-gauge) carries a current of 3.00 amps, (a) What is the...
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The figure below represents a section of a circular conductor of nonuniform diameter carrying a current of I = 5.50 A. The radius of cross-section A₁ is ₁ = 0.270 cm.
11
The radius
A1
I
(a) What is the magnitude of the current density across A₁?
A/m²
7₂
at A₂ is larger than the radius ₁
Assume A₂ = 2A₁.
A2
(b) Is the current at A₂ larger, smaller, or the same?
The current is larger.
O The current is smaller.
O The current is the same.
(c) Is the current density at A₂ larger, smaller, or the same?
O The current density is larger.
O The current density is smaller.
O The current density is the same.
(d) Specify the radius at A₂.
mm
(e) Specify the current at A₂.
A
at A₁.
(f) Specify the current density at A₂.
A/m²
Transcribed Image Text:The figure below represents a section of a circular conductor of nonuniform diameter carrying a current of I = 5.50 A. The radius of cross-section A₁ is ₁ = 0.270 cm. 11 The radius A1 I (a) What is the magnitude of the current density across A₁? A/m² 7₂ at A₂ is larger than the radius ₁ Assume A₂ = 2A₁. A2 (b) Is the current at A₂ larger, smaller, or the same? The current is larger. O The current is smaller. O The current is the same. (c) Is the current density at A₂ larger, smaller, or the same? O The current density is larger. O The current density is smaller. O The current density is the same. (d) Specify the radius at A₂. mm (e) Specify the current at A₂. A at A₁. (f) Specify the current density at A₂. A/m²
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