BioMedical Admissions Test (BMAT) 2025 – 400 Free Practice Questions to Pass the Exam

Increasing resistance in a circuit leads to a decreased current flow due to Ohm's Law, which states that the current (I) in a circuit is equal to the voltage (V) divided by the resistance (R), or I = V/R. When resistance increases while the voltage remains constant, the current must decrease as a consequence.

This relationship illustrates a fundamental principle of electronics. The higher the resistance, the more opposition there is to the flow of electric charge, resulting in a drop in the amount of current that can pass through the circuit. This is particularly relevant in various electrical applications, such as in the design of resistors used to limit current in specific parts of circuits or in devices like light bulbs.

In contrast, other outcomes do not align with this principle. For instance, increasing resistance would not lead to an increase in current flow, nor would it have no effect on current flow. The claim that it shortens circuit life also lacks a direct relation to the concept of resistance affecting current and is more dependent on factors like heat generation and the quality of components used in the circuit.