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

Which statement best describes the relationship between resistance and current when voltage is fixed?

Current is governed by I = V/R. With the voltage fixed, the current is inversely related to resistance: as resistance increases, current decreases. For example, at 12 volts, a 6-ohm load draws 2 amperes (I = 12/6). If the resistance rises to 12 ohms while the voltage stays at 12 volts, the current drops to 1 ampere (I = 12/12). This shows how changing resistance while keeping voltage constant changes the current accordingly. The idea that voltage alone determines current in all cases ignores the role of resistance, which is essential to the actual current.

Current is governed by I = V/R. With the voltage fixed, the current is inversely related to resistance: as resistance increases, current decreases. For example, at 12 volts, a 6-ohm load draws 2 amperes (I = 12/6). If the resistance rises to 12 ohms while the voltage stays at 12 volts, the current drops to 1 ampere (I = 12/12). This shows how changing resistance while keeping voltage constant changes the current accordingly. The idea that voltage alone determines current in all cases ignores the role of resistance, which is essential to the actual current.