An electric current contains a battery that produces a voltage of 60 voltsV , a resistor with a resistance of 13 ohms, and inductor with an inductance of 5 henrys H  . Using calculus, it can be shown that I I t    (in amperes, A), when t seconds after the switch is closed is 13 5 60 1 13 t I e          1.4.1 Use this equation to express the time t as function of the currentI 

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