What is the formula for the time constant in a series resistor-capacitor (R-C) circuit?

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R divided by CR multiplied by the square of CProduct of resistance and capacitanceSquare of resistance times capacitanceNo time constant exists

Explanation

The time constant (τ) in a series R-C circuit is calculated by multiplying the resistance (R) by the capacitance (C), i.e., τ = R × C. This value represents the time required for the capacitor to charge or discharge approximately 63.2% of the difference between its initial and final voltage.