Which of the Following Has the Largest Current Flowing Through

Which of the following has the largest current flowing through it?

A) a 1-m long copper wire of diameter 1 mm connected to a battery of 10 V
B) a 0.5-m long copper wire of diameter 0.5 mm connected to a 5-V battery
C) a 2-m long copper wire of diameter 2 mm connected to a 20-V battery
D) a 1-m long copper wire of diameter 0.5 mm connected to a 5-V battery
E) All of the choices have the same current.

Correct Answer:

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