If the voltage in a circuit doubles while the resistance stays the same, what happens to the current?

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Study for the Abeka Science Matter and Energy Test 7. Enhance your knowledge with flashcards and multiple-choice questions, each with explanations. Get ready for academic success!

Multiple Choice

If the voltage in a circuit doubles while the resistance stays the same, what happens to the current?

Explanation:
Current depends on voltage and resistance in a direct way: I = V/R. If the resistance stays the same and the voltage doubles, the current must also double. For example, with a 3 Ω resistor, increasing voltage from 6 V to 12 V changes current from 6/3 = 2 A to 12/3 = 4 A. So the current doubles. The current wouldn’t stay the same because it’s tied to the voltage when resistance is fixed, and it wouldn’t quadruple unless the voltage increased by four times or the resistance changed in a compensating way.

Current depends on voltage and resistance in a direct way: I = V/R. If the resistance stays the same and the voltage doubles, the current must also double. For example, with a 3 Ω resistor, increasing voltage from 6 V to 12 V changes current from 6/3 = 2 A to 12/3 = 4 A. So the current doubles. The current wouldn’t stay the same because it’s tied to the voltage when resistance is fixed, and it wouldn’t quadruple unless the voltage increased by four times or the resistance changed in a compensating way.

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