Summary of capacitor dynamic analysis questions

What happens when a capacitor is charged to a maximum Q?

Once charged to its maximum possible Q, the capacitor's plates are separated by a factor of four (that is, the distance between the plates is quadrupled) while the capacitor is kept hooked to the power supply. As a consequence of this change in geometry:

What happens if a capacitor accumulated a long period of time?

Solution: After a long period of time, the accumulated charge on the capacitor's plates will produce a voltage across the capacitor that is equal to the voltage across the power supply. At that point, there will no longer be current in the circuit.

What is the basic configuration of a capacitor?

Figure 5.1.1 Basic configuration of a capacitor. In the uncharged state, the charge on either one of the conductors in the capacitor is zero. During the charging process, a charge Q is moved from one conductor to the other one, giving one conductor a charge + Q , and the other one a charge − Q .

What is capacitance C of a capacitor?

• A capacitor is a device that stores electric charge and potential energy. The capacitance C of a capacitor is the ratio of the charge stored on the capacitor plates to the the potential difference between them: (parallel) This is equal to the amount of energy stored in the capacitor. The is equal to the electrostatic pressure on a surface.

How many amps does a capacitor draw from a source?

It is found that when a capacitor and resistor are placed across the source as characterized above, an ammeter in the circuit reads 1.2 amps. What is the maximum current drawn from the source? Solution: The maximum current will be the amplitude of the current function.

How do you calculate the capacitance of a capacitor?

For a potential difference V of 150 V and a frequency f of 60 Hz, the average current in the ammeter is 4.8 UA Calculate the capacitance, in pF, of the capacitor. capacitance = (c) A second capacitor, having the same capacitance as the capacitor in (b), is connected into the circuit of Fig. 7.1 . The two capacitors are connected in series.