State two applications of time constant in RC circuits. (2 marks)June/July 2020
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The time constant (T) of an RC circuit is a measure of the time it takes for the voltage across the capacitor to reach approximately 63% of its final value, or for the current through the circuit to decay to approximately 37% of its initial value. The time constant is determined by the values of the resistor (R) and the capacitor (C) in the circuit and is given by the formula:
T = RC
The time constant of an RC circuit has several applications, including: