Solve the problem.If a resistor and inductor are connected in series to a battery of emf ?, the current in the circuit is given by  where ? is the time constant of the circuit, R is the resistance, and t is the time since the circuit was closed. Find the expression for dI/dt.

A. - et/?
B. e-t/?
C.
D. e-t/?

Answer: B

Mathematics

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