# The point of this problem is to show how slowly electrons travel on average through a thin wire, even for large values of current.A wire made from iron with a cross-section of diameter 0.840 mm carries a current of 11.0 A. Calculate the "areal current density"; in other words, how many electrons per square meter persecond flow through this wire? (Enter your answer without units.)

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(b) Enter the larger possible value of R. help_outlineImage TranscriptioncloseThe point of this problem is to show how slowly electrons travel on average through a thin wire, even for large values of current. A wire made from iron with a cross-section of diameter 0.840 mm carries a current of 11.0 A. Calculate the "areal current density"; in other words, how many electrons per square meter per second flow through this wire? (Enter your answer without units.) fullscreen
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Step 1

Given information; Here, I is the current, d is the wire’s diameter and e is the electronic charge.

Step 2

The cross-section area (A) can be determined as, ...

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