In contrast to Prob. 28.28, real resistors may not always obey Ohm’s law. For example, the voltage drop may be nonlinear and the circuit dynamics is described by a relationship such as

Where all other parameters are as defined in Prob. 28.28 and l is a known reference current equal to 1. Solve for i as a function of time under the same conditions as specified in Prob.28.28.

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**6 -(4)]- di dt