Question

A series RC circuit contains a 1,000 ohm resistor and a 0.025 microfarad capacitor. What is the time constant of this circuit?

Answer 1

The RC time constant, also called tau, the time constant (in seconds) of an RC circuit, is equal to the product of the circuit resistance (in ohms) and the circuit capacitance (in farads), i.e.

$\tau = RC$

Here,

R = Resistance

C = Capacitance

Replacing we have that

$\tau = (1000)(0.025*10^{6})$

$\tau = 25*10^{-6}$

$\tau = 25\mu s$

Therefore the time constant of this circuit is $\tau = 25\mu s$