Solve for the RC time constant.
R = 69,000 ohms
C =.001 f
What is the formula used to compute the RC time constant of any RC circuit?
t = RC
At this point, we must stress a very important point:
When C is charging, the voltage on C (EC) plus the voltage across R (ER) must
100 volts DC are applied to the RC circuit in fig. 8.
At the instant the switch is closed, C starts changing.
In .1 RC time, EC = 10 volts and ER = 90 volts (EC +ER = Eapp).
In 1 RC time, EC = 63 volts and ER = 37 volts (EC + ER = Eapp).
In 2.3 RC time, EC = 90 volts and ER = 10 volts (EC + ER = Eapp).
In 10 RC time, EC = 100 volts and ER = 0 volts (EC + ER= Eapp).
With 150 volts applied to an RC circuit for .1 RC time, EC = 15 volts
and ER =