× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
fractions to illustrate voltage divider
Posted to the Waveform Library on 11/25/2023

Unloaded battery voltage is 12.6 volts, or 12.6 volts EMF source. As starter motor spins the voltage dropped in battery internal resistance is 1.6 volts. Therefore the fraction 11/12.6* EMF source of 12.6 volts is voltage available to the starter.