A circuit has a current of 2 A If the resistance in the circuit decreases to one-fourth of its original amount while the voltage remains constant, what will be the resulting current?

By Ohm’s law, current equals voltage divided by resistance. With voltage constant, reducing the resistance to one-fourth makes the current four times as large: 2 A × 4 = 8 A. The resulting current is 8 A, choice C.

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