FE Electrical and Computer Practice Exam 2026 – Comprehensive All-in-One Guide for Exam Success!

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What effect does increasing resistance have on a circuit while maintaining a constant voltage according to Ohm's law?

Current increases

Current remains constant

Current decreases

According to Ohm's law, which is expressed as $ V = I \times R $ (where $ V $ is voltage, $ I $ is current, and $ R $ is resistance), maintaining a constant voltage while increasing resistance will lead to a decrease in current.

When resistance is increased, the equation can be rearranged to find current: $ I = \frac{V}{R} $. As resistance $ R $ increases and voltage $ V $ stays the same, the value of $ \frac{V}{R} $ becomes smaller. This means that the current $ I $ is inversely proportional to resistance when voltage is constant. Thus, an increase in resistance will result in a lower current flowing through the circuit.

This aligns perfectly with the principles of Ohm's law, reinforcing the understanding that for a fixed voltage source, as resistance increases, the current must decrease.

Voltage decreases