If the supply voltage is quadrupled while resistance stays the same, how does the current change?

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Study for the BCTC Industrial Maintenance Technology AMTEC – NOCTI Mechatronic Assessment. Prepare with comprehensive question sets and detailed explanations. Ensure success with our targeted practice!

Multiple Choice

If the supply voltage is quadrupled while resistance stays the same, how does the current change?

Explanation:
Current follows Ohm’s law: I = V / R. If the resistance stays the same, current is directly proportional to voltage. Quadrupling the supply voltage makes the current four times larger because I2 = (4V)/R = 4(V/R) = 4I1. So the current quadruples. This also means power would rise by a factor of four, since P = VI.

Current follows Ohm’s law: I = V / R. If the resistance stays the same, current is directly proportional to voltage. Quadrupling the supply voltage makes the current four times larger because I2 = (4V)/R = 4(V/R) = 4I1. So the current quadruples. This also means power would rise by a factor of four, since P = VI.

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