If the voltage across a resistor doubles while its resistance remains the same, what happens to the current?

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Study for the IGCSE Physics Electricity. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

If the voltage across a resistor doubles while its resistance remains the same, what happens to the current?

Explanation:
The important idea is Ohm’s law: current through a resistor equals the voltage across it divided by its resistance, I = V/R. If the resistance stays the same and you double the voltage, the current must double as well because I = (2V)/R = 2(V/R). So the current doubles.

The important idea is Ohm’s law: current through a resistor equals the voltage across it divided by its resistance, I = V/R. If the resistance stays the same and you double the voltage, the current must double as well because I = (2V)/R = 2(V/R). So the current doubles.

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