Q8: Figure P27.8 represents a section of a conductor of nonuniform diameter carrying a current of I = A. The radius of cross-section A1 is r1 = cm.
(a) What is the magnitude of the current density across A1? The radius r2 at A2 is larger than the radius r1 at A1.
(b) Is the current at A2 larger, smaller, or the same?
(c) Is the current density at A2 larger, smaller, or the same? Assume A2 = 4A1. Specify the
(d) radius,
(e) cur- rent, and
(f) current density at A2.