Answered: Current flows through a long…

Current flows through a long cylindrical conductor with radius 2R. The magnitude of the current is 21 in the region r< R and I in the region R

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 61P

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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

Current flows through a long cylindrical conductor with
radius 2R. The magnitude of the current is 21 in the region
r< R and I in the region R <r < 2R. All of the currents
flow in the same direction and are distributed uniformly in
their respective regions. The magnetic field in the region
R<r<2R is given by
μοι
a.)
TTT
b.)
I(r²-R²)
Но
- 31
2πr
+ 12 ) = (²
Но
d.) 2πr
I (²-R²)
3R²

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