document.write( "Question 685480: Hi - I submitted this word problem earlier today but now realize that some of the information was typed incorrectly. This problem is about electric circuits.
\n" ); document.write( "I have the answers but no idea how they were arrived at. I will rewrite the problem here and then the 2 questions I am being asked to answer. Thank you - your website has been extremely helpful.\r
\n" ); document.write( "\n" ); document.write( "An electric circuit contains a battery that produces a voltage of 60 volts (v), a resistor with a resistance of 13 ohms and an inductor with an inductance of 5 henrys (H.) Using calculus, it can be shown that the current I=I(t)(in amperes,A) t seconds after the switch is closed is I = 60/13 (I-e^-13/15.)\r
\n" ); document.write( "\n" ); document.write( "First question: Use this equation to express the time t as a function of the current I: I = 60-13(I-e^-13/5). The answer is t= -5/13 ln(I-13/60I.)\r
\n" ); document.write( "\n" ); document.write( "Second question: After how many seconds is the current 2A? The answer is 0.218s. \n" ); document.write( "

Algebra.Com's Answer #424461 by Alan3354(69443) $\"\"$ $\"About$

You can put this solution on YOUR website!
First question: Use this equation to express the time t as a function of the current I: I = 60-13(I-e^-13/5). The answer is t= -5/13 ln(I-13/60I.)
\n" ); document.write( "-------
\n" ); document.write( "I = 60-13(I-e^-13/5)
\n" ); document.write( "There's no t in the equation.
\n" ); document.write( "------
\n" ); document.write( "Second question: After how many seconds is the current 2A? The answer is 0.218s. \n" ); document.write( "

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