Drag the three red sliders in the left pane to change the voltage (V), resistance (R), and inductance (L) of the circuit. In the right pane, the current, [math]i[/math], of the circuit is graphed as a function of time.[br][br]Ohm's law states that (with no inductance) [math]i=\frac{V}{R}[/math]. In a circuit with no inductance, current is constant.[br][br]Inductance is resistance to a [i]change[/i] in current. If inductance, [math]L[/math], is present in a circuit, Ohm's law generalizes to [math]L\frac{di}{dt}+Ri=V[/math]. If an open circuit with inductance is thrown closed, then the current will start at zero and gradually increase, asymptotically approaching [math]\frac{V}{R}[/math].[br][br]Units: [math]V[/math] volts, [math]R[/math] ohms, [math]L[/math] henries, [math]i[/math] amperes, [math]t[/math] seconds.