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- General Radiotelephone Operator (Element 3 (GROL)) »
- FCC Element 3 - General Radiotelephone
83. After two time constants, the capacitor in an RC circuit is charged to what percentage of the supply voltage?
After two time constants, a capacitor in an RC circuit charges to approximately 86.5% of the supply voltage, as determined by the charging equation Vc = Vs (1 − e{−t/RC}) when t = 2RC.
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