What is the effect of increased resistance in a circuit?

Increased resistance in a circuit results in decreased current flow, according to Ohm's Law, which is represented by the equation I = V/R, where I is the current, V is the voltage, and R is the resistance. When resistance (R) increases while the voltage (V) remains constant, the current (I) must decrease. This relationship highlights that resistance opposes the flow of current; therefore, higher resistance leads to a lower current flow in the circuit. Understanding this principle is essential for troubleshooting electrical circuits and for designing systems that require specific current levels to operate effectively.