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Well firstly, is the capacitor connected to a DC or AC supply.

On a DC supply the capacitor would draw current until it had fully charged, at which point the current falls to the leakage current. Electrolytic capacitor will always leak a little.

On an AC connection, current will pass continuously, and the capacitor may rupture if connected across an AC supply.

The current that would flow on an AC connection is given by the impedance, which is calculated from the reciprocal of 2 x Pi x F x C

Because it is the reciprocal, the impedance reduces as the capacitance in Farads (F) increases. So, the bigger the capacitance, the higher the current.

Therefore, for AC, only low values of capacitor are found connected across the supply (usually with a resistor in series) for interference snubbing across a contact or switch. Larger values are placed in series with the current, to act as current limiters or high pass filters.

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13y ago
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6y ago

Depending on the situation, you may be able to use Ohm's Law for that. That is, for each circuit, calculate the equivalent resistance, then divide the voltage by this equivalent resistance to get the current.

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6y ago

The circuit with less resistance will always draw the most current.

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13y ago

Parallel.

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Q: Which circuit draws the largest amount of current from the battery parallel or series?
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