How does increasing voltage affect current when resistance stays constant?

When resistance remains constant, increasing the voltage across a conductor results in a proportional increase in the electric current flowing through it.1

This relationship is defined by Ohm’s law, which is expressed mathematically as:

$$I=\frac{V}{R}$$

In this equation:
* I represents the current in amperes.1
* V represents the voltage or potential difference in volts.12
* R represents the resistance in ohms.12

Because the resistance (R) is constant, the current (I) and voltage (V) are directly proportional. For example, if the voltage across a material is tripled, the current will also triple. This principle holds true for materials where resistance does not change over the applied range of voltage and current.1