What is an RC time constant? When an RC series circuit is connected to a DC sour

Question

What is an RC time constant? When an RC series circuit is connected to a DC source, what is the voltage on the capacitor after one time constant when (a) charging from zero voltage, and (b) discharging from a fully charged condition? If the resistance in an RC circuit is increased, would the charging time of the capacitor increase or decrease? Explain. The voltage across a capacitor can be measured with a common voltmeter, but... Explain what would happen when you make such a measurement. 1. 2. 3. 4.

Explanation / Answer

1) In RC (resistive & capacitive) circuits, time constant is the time in seconds required to charge a capacitor to 63.2% of the applied voltage. This period is referred to as one time constant. After two time constants, the capacitor will be charged to 86.5% of the applied voltage.

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