What is the formula to calculate the time constant of an RC circuit?

ฯ = R * C

Where:

ฯ = Time constant (in seconds)

R = Resistance (in ohms)

C = Capacitance (in farads)

When a step voltage is applied to an RC circuit, the voltage or current in the circuit will rise or decay over time towards its final value, and the time constant determines how quickly this process occurs. The larger the time constant, the slower the response of the circuit to the input change, and vice versa.