The current density is a vector whose magnitude J is the current 1 per unit cross-sectional area A. In SI, its unit is one amp per square meter (1 A/m2). A wire has a cross-sectional area of 7.2 x 10-6 m2 and is carrying a current of 3.6 mA. Find the magnitude of the current density. Use the formula: Hint mA =10-3A %3D Current J= or J= A Crossectional Area 0.5 x 103 A/m2 5.0 x10 A/m2 3.6 x 106 A/m2 O 7.6 x 106 A/m2

The current density is a vector whose magnitude J is the current 1 per unit cross-sectional area A. In SI, its unit is one amp per square meter (1 A/m2). A wire has a cross-sectional area of 7.2 x 10-6 m2 and is carrying a current of 3.6 mA. Find the magnitude of the current density. Use the formula: Hint mA =10-3A %3D Current J= or J= A Crossectional Area 0.5 x 103 A/m2 5.0 x10 A/m2 3.6 x 106 A/m2 O 7.6 x 106 A/m2

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 15P: If the current carried by a conductor is doubled, what happens to (a) the charge carrier density,...

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