Electronics for Beginners by Jonathan Bartlett

Author:Jonathan Bartlett
Language: eng
Format: epub
ISBN: 9781484259795
Publisher: Apress

Well, first, we need to convert the capacitance from microfarads to farads. 66 μF is 66 millionths of a farad, so it would be 0.000066 F. Now, we just need to plug the numbers into the equation:

Therefore, if I attached a 66 μF capacitor to a 9 V source, the capacitor would store 0.000594 coulomb of charge.

After my capacitor is charged up, I can use it as a very tiny battery. That is, I could disconnect it from the circuit in Figure 16-2 and reconnect it as the battery for another circuit. However, as I mentioned, this will be a very, very tiny battery. Additionally, as the charge leaves the capacitor, the voltage of the battery will decrease as well.

If we use the capacitor as a battery, if we know how much charge is stored in the capacitor, we can rearrange Equation 16.1 slightly to figure out how much voltage it will deliver when it begins to discharge:

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