Question

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

1) Doubling the voltage across the wire
2) Halving the resistance of the wire
3) Increasing the length of the wire
4) Decreasing the temperature of the wire

Answer 1

Doubling the voltage across the wire would double the amount of current flowing through it.

Step-by-step explanation:

The correct answer is 1) Doubling the voltage across the wire.

To understand why doubling the voltage across the wire would double the amount of current flowing through it, you need to know Ohm's Law. Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage across it and inversely proportional to its resistance.

In this case, doubling the voltage across the wire would result in a doubling of the current flowing through the wire, as long as the resistance remains constant. The resistance of the wire is not mentioned in the given options, so we can assume that it remains constant.