The relationship between current flow and voltage in a capacitor is...?

Choices I have are:





A. Dynamic


B. In Phase


C. Out of Phase


D. Static





An explanation would be great, thanks.

The relationship between current flow and voltage in a capacitor is...?
The answer is out of phase as the current is by 90deg "faster"
Reply:Current leads voltage in a capacitor. Current flows through a capacitor to build up a voltage across the cap. This makes them out of phase.
Reply:Both previous answers are correct but I want to add some imagery to this answer. Imagine two barrels connected by a thin tube at the bottom. On the tube there's a valve. The barrel on the left is full of water, the right barrel is empty.


Now open the valve, you have the full pressure of water rushing in to fill the right barrel, as the water levels reach 1/2 way this current of water through the thin tube becomes reduced until both are completely filled.





An empty capacitor will in theory suck current in at an infinite rate (but there is no such thing as a perfect capacitor hence we'll always have minimal series resistance etc.)