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<p>when in use). A current source in parallel may be added to represent its leakage (which discharges the battery over a long period).<br/>
* On a first degree of approximation, a <a href="page.php?w=resistor">resistor</a> is represented by a resistance. A more refined model also includes a series inductance to represent the effects of its lead inductance (resistors constructed as a spiral have more significant inductance). A capacitance in parallel may be added to represent the capacitive effect of the proximity of the resistor leads to each other.</p><p>
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