How do the high-velocity high-temperature gases cause the rotor of a gas turbine to rotate?

Correct Answer: Option C — By transferring velocity energy and thermal energy to the turbine blades.

Turbine rotation is achieved through the impulse and reaction principles. High-velocity, high-temperature gases strike the turbine blades, transferring kinetic energy and thermal energy to the rotor. This momentum exchange creates the torque necessary to drive the compressor and the output shaft, sustaining the continuous Brayton cycle operation.