Prepare for the Automotive Service Technician Period 1 exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

What term describes the opposition to electron flow?

Resistance describes the opposition to electron flow. As electrons move through a conductor, they collide with atoms, which impedes the current and converts some energy into heat. The stronger this opposition, the smaller the current for a given voltage, as described by Ohm’s law: I = V / R (or V = I R). Voltage is the driving force that pushes electrons, not the opposition itself. Capacitance concerns storing charge and resisting changes in voltage, while inductance concerns resisting changes in current through magnetic fields. In a steady DC circuit, resistance is the main factor that limits current, and it depends on material, size, temperature, and length (R = ρL/A for a uniform conductor).

Resistance describes the opposition to electron flow. As electrons move through a conductor, they collide with atoms, which impedes the current and converts some energy into heat. The stronger this opposition, the smaller the current for a given voltage, as described by Ohm’s law: I = V / R (or V = I R). Voltage is the driving force that pushes electrons, not the opposition itself. Capacitance concerns storing charge and resisting changes in voltage, while inductance concerns resisting changes in current through magnetic fields. In a steady DC circuit, resistance is the main factor that limits current, and it depends on material, size, temperature, and length (R = ρL/A for a uniform conductor).