Physics 201 Introduction to Electricity & Magnetism 

November 15 Applying Ampere's Law  



Using Ampere's
Law to calculate B
Determine the magnetic field created by a current
carrying wire Find the field both inside and outside of the wire.
The wire is of radius R and there is a uniform current density such that
the total current is I.
A current flows down the center conducting cylinder (r<c) of a coaxial cable. A current of the same magnitude flows in the opposite direction along the outer conducting cylindrical shell (b < r < a). Determine the magnetic field everywhere.
Current flows along a thin, infinite sheet. The current per length along the sheet is j (A/m). What is the magnetic field above and below the sheet?


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