What happens to the current if the resistance in a circuit increases while the voltage remains constant?

When the resistance in a circuit increases while the voltage remains constant, the current in the circuit decreases. This relationship is governed by Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R), expressed mathematically as I = V/R.

In this equation, if the voltage is constant and the resistance increases, the denominator of the fraction increases. Since the voltage does not change, a larger resistance means that the overall value of the fraction (and thus the current) must decrease. Therefore, the current moves in the opposite direction of resistance when voltage is held constant. This principle is fundamental in understanding how circuits operate and is critical knowledge for anyone working in electrical or lineman fields.