Resistance in a circuit is primarily influenced by which of the following factors?

Study for the Electrical Theory Test. Study with flashcards and multiple-choice questions, each question has hints and explanations. Get ready for your exam!

Resistance in a circuit is influenced by several key factors, making the correct response encompass all of them.

The length of the wire plays a crucial role in determining resistance because longer wires have more material that electrons must move through. This creates more opportunities for collisions between the electrons and atoms in the wire, leading to increased resistance.

The temperature of the wire significantly affects its resistance as well. Generally, increasing the temperature of a conductor causes its atoms to vibrate more vigorously, which can impede the flow of electrons and thus increase resistance. Conversely, lowering the temperature typically reduces resistance in conductive materials.

The material of the wire is also critical since different materials have different intrinsic resistivities. Metals like copper and aluminum have low resistivities and thus low resistances, while materials like rubber have a high resistivity, resulting in high resistance.

Considering these factors—length, temperature, and material—each contributes to the overall resistance in a circuit, which is why acknowledging all these influences is the correct approach. They interact to determine how easily current can flow through the conductor in a circuit.

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