In an AC circuit, if resistance remains constant and voltage is doubled, what happens to the current?

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Study for the BCTC Industrial Maintenance Technology AMTEC – NOCTI Mechatronic Assessment. Prepare with flashcards and multiple choice questions, with hints and explanations. Get ready for your exam!

Multiple Choice

In an AC circuit, if resistance remains constant and voltage is doubled, what happens to the current?

Explanation:
Current changes follow a direct proportion to voltage when resistance stays the same. According to Ohm's law, I = V/R, so if V is doubled and R is constant, I must double as well. For example, with a 10-ohm resistor, increasingVoltage from 10 V to 20 V changes current from 1 A to 2 A. In AC circuits, using RMS values, I_rms = V_rms / R, so doubling the voltage still doubles the current.

Current changes follow a direct proportion to voltage when resistance stays the same. According to Ohm's law, I = V/R, so if V is doubled and R is constant, I must double as well. For example, with a 10-ohm resistor, increasingVoltage from 10 V to 20 V changes current from 1 A to 2 A. In AC circuits, using RMS values, I_rms = V_rms / R, so doubling the voltage still doubles the current.

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