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18-5 A self-inductance L, a resistance R, and a battery of emf epsilon b are all...

18-5 A self-inductance L, a resistance R, and a battery of emf epsilon b are all connected in series. Use energy considerations to show that the current i satisfies the differential equation L (di/dt) + Ri = epsilon b. Now assume that i tidak sama dengan 0 and the battery is switced out of the circuit. Solve the resulting equation and find the relaxation time of this system.

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