Question

For a constant resistance, how is the voltage related to the current?

Voltage is inversely proportional to current, so when the voltage doubles, the current is cut in half.
Voltage is directly proportional to current, so when the voltage doubles, the current is cut in half.
Voltage is inversely proportional to current, so when the voltage doubles, the current doubles.
Voltage is directly proportional to current, so when the voltage doubles, the current doubles.

Answer 1

Voltage is directly proportional to current, so when the voltage doubles, the current doubles.

Reason: Ohm’s law V = I·R. For constant R, I = V/R, so I changes in direct proportion to V.