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Problem 5 The switch S in the circuit shown in the figure has been closed a long time. S R, =12 Q a Find the battery current, the cur- E =6V R,=802 L=2.0H a) rent in the 80SN resistor, and the current in the inductor L. The switch S is opened. Find the voltage across the inductor just after the switch is b) opened. Which end is more postitive, a or b? c) switch is opened. Use numbers (not symbols) for the coefficients. Write an expression for the current in the inductor as a function of the time after the ell

Problem 5 The switch S in the circuit shown in the figure has been closed a long time. S R, =12 Q a Find the battery current, the cur- E =6V R,=802 L=2.0H a) rent in the 80SN resistor, and the current in the inductor L. The switch S is opened. Find the voltage across the inductor just after the switch is b) opened. Which end is more postitive, a or b? c) switch is opened. Use numbers (not symbols) for the coefficients. Write an expression for the current in the inductor as a function of the time after the ell

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How do you do this one? Specifically, for b), the answer gives Vb > Va, why is that? In general how do we know which side has higher potentials?

 

(notice: this is not a graded question, it's a practice problem that comes with an answer which I don't quite understand, you can see from how I asked the question that the answer is provided...)

Problem 5 The switch S in the circuit shown in the S R1 =12Q figure has been closed a long time. a E =6V R,=802 a) rent in the 802 resistor, and the current in the inductor L. Find the battery current, the cur- L=2.0H b The switch S is opened. Find the voltage across the inductor just after the switch is b) opened. Which end is more postitive, a or b? c) switch is opened. Use numbers (not symbols) for the coefficients. Write an expression for the current in the inductor as a function of the time after the ww
Transcribed Image Text:Problem 5 The switch S in the circuit shown in the S R1 =12Q figure has been closed a long time. a E =6V R,=802 a) rent in the 802 resistor, and the current in the inductor L. Find the battery current, the cur- L=2.0H b The switch S is opened. Find the voltage across the inductor just after the switch is b) opened. Which end is more postitive, a or b? c) switch is opened. Use numbers (not symbols) for the coefficients. Write an expression for the current in the inductor as a function of the time after the ww
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