Fig. 7 represents a series RC circuit, connected across a DC voltage source.
The value of R and the value of C determine the RC
TIME CONSTANT of the circuit.
The RC TIME CONSTANT of any RC circuit is THE TIME THAT IT TAKES A CAPACITOR TO
CHANGE ITS CHARGE BY 63%. (Actually 63.2%, but for simplicity and ease of explanation, we use
Since 63% IS a constant, it will hold true regardless of the value of R and C.
In an RC circuit, THE TIME THAT IT TAKES A CAPACITOR TO CHANGE ITS CHARGE
BY 63% is the
of the circuit.
RC time constant
If we know the RC TIME CONSTANT of an RC circuit, we know how long it will
take the capacitor to change its charge by 63%. The RC TIME CONSTANT of an RC