This document discusses the speed-torque characteristic of induction machines derived from the equivalent circuit model. It explains: 1) How to derive the torque-slip characteristic equation from the equivalent circuit, showing it peaks at a maximum torque point before decreasing to zero torque at synchronous speed. 2) How the complete torque-speed characteristic includes motoring, generating, and braking regions depending on the direction of slip. 3) How to determine the stable operating point where the motor and load characteristics intersect within the stable torque region between peak torque and synchronous speed.