Question: The electric current i (in A) in a circuit with a battery of voltage E, a resistance R, and an inductance L, is where t
The electric current i (in A) in a circuit with a battery of voltage E, a resistance R, and an inductance L, is

where t is the time after the circuit is closed. See Fig. 11.4. Find i for E = 6.20 V, R = 1.20Ω, L = 3.24H, and t = 0.00100 s. (The number e is irrational and can be found from the calculator.)

i E R a (1 - e-Ri/L),
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