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Two simple circuits are constructed, each consisting of a resistor connected to a battery.

In the first circuit, the resistor has a resistance of $R$, the battery has a voltage of $V$, and an amount of current $I$ flows from the battery. In the second circuit, the resistor has a resistance of $2R$ and the battery has a voltage of $2V$.

What amount of current flows from the battery in the second circuit?

A

$\cfrac{I}{4}$

B

$\cfrac{I}{2}$

C

$I$

D

$2I$

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