Which of the following would double the amount of current flowing through a piece of metal wire?

Question

01-03-2018
Physics

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Which of the following would double the amount of current flowing through a piece of metal wire?

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jamuuj jamuuj · Answer 1 · 2018-03-13T10:05:57+01:00

Considering the answers.
1. Halve the voltage across it
2. Quarter the voltage across it
3. Double the voltage across it
4. Quadruple the voltage across

The appropriate answer would be 3. Double the voltage. According to ohms law the current through a conductor between two points is directly proportional to the voltage across the two points at a constant resistance. Therefore a increase in voltage causes a corresponding increase in the current.