🔍 Key Concepts

• Magnetic induction and how motion in a magnetic field can create an electrical signal • What part of the system actually moves: the shaft/gear teeth vs. the sensor itself • Difference between a speed-sensing principle and a general physics law that is not specific to magnetics

💭 Think About

• Which choice directly explains how a changing magnetic condition gets turned into an electrical signal that can be measured as speed? • Look for the option that mentions both a magnetic field and something moving relative to that field. • Which options describe facts that are true in general, but do NOT actually explain how the pickup makes an electrical signal proportional to speed?

✅ Before You Answer

• Identify which answer includes both magnetic field and relative motion of a metal part. • Eliminate any option that talks about magnetism but does NOT describe how an electrical signal is generated. • Eliminate any option that is just a general physics formula and not a principle of a sensor operation.