ELECTRONIC PRINCIPLES - OD1647 - LESSON 1/TASK 1
time T1 (time one, when the capacitor reaches full charge or
discharge potential will be used. Note that switches S1 and S2
move at the same time and can never be both closed at the same
time.
When switch S1 of the circuit in figure 34 is closed at to, the
source voltage (Es) is instantly felt across the entire circuit.
Graph A, figure 34, shows an instantaneous rise at time to from
zero to source voltage (Es = 6 volts). The total voltage can he
measured across the circuit between points 1 and 2. Now look at
figure 34, graph B, which represents the charging current in the
capacitor (ic). At time to, charging current is MAXIMUM. As time
elapses forward time t1, there is a continuous decrease in
current flowing into the capacitor. The decreasing flow is
caused by the voltage buildup across the capacitor. At time t1
current flowing in the capacitor stops. At this time, the
capacitor has reached full charge and has stored maximum energy
in its electrostatic field. Figure 34, graph C, represents the
voltage drop (er) across the resistor (R). The value of er is
determined by the amount of current flowing
FIGURE 34. CHARGE OF AN RC SERIES CIRCUIT.
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