Amp Up Your Skills with the 2026 ASE Electrical & Electronic Systems (A6) Thrill Test!

A high resistance connection in an electrical circuit results in decreased current flow. According to Ohm's Law, which states that voltage equals current times resistance (V = I × R), an increase in resistance while maintaining a constant voltage leads to a reduction in current.

When current flow decreases due to high resistance, there is less power delivered to the load since power (measured in watts) can be calculated as the product of voltage and current (P = V × I). Additionally, high resistance can lead to heat generation due to the energy lost during the flow of current. This heat is a byproduct of the resistance itself, which converts some electrical energy into thermal energy, often resulting in heat build-up in the circuit. Therefore, a high resistance connection not only impacts the efficiency of the circuit by reducing current flow but also can lead to increased heat generation as a consequence of this reduced efficiency.

The other options do not accurately reflect the impact of high resistance in a circuit. For example, increased power delivery typically requires either higher voltage or lower resistance, rather than high resistance. Saying there is no effect on performance contradicts the fundamental laws of electricity, and improved voltage stability is generally associated with low resistance connections that allow for more consistent current flow.